/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/chl/chromosome-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:45:46,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:45:46,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:45:46,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:45:46,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 17:45:46,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:45:46,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:45:46,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:45:46,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:45:46,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:45:46,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:45:46,820 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:45:46,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:45:46,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:45:46,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:45:46,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:45:46,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:45:46,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:45:46,822 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:45:46,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:45:46,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:45:47,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:45:47,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:45:47,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:45:47,086 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:45:47,088 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:45:47,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl [2021-02-19 17:45:47,088 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl' [2021-02-19 17:45:47,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:45:47,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:45:47,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:45:47,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:45:47,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:45:47,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:45:47,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:45:47,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:45:47,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:45:47,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... [2021-02-19 17:45:47,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:45:47,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:45:47,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:45:47,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:45:47,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:45:47,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:45:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:45:47,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:45:47,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:45:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:45:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:45:47,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:45:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:45:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:45:47,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:45:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:45:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:45:47,215 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:45:47,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:45:47,520 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-19 17:45:47,521 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:45:47 BoogieIcfgContainer [2021-02-19 17:45:47,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:45:47,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:45:47,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:45:47,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:45:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:45:47" (1/2) ... [2021-02-19 17:45:47,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a0be92 and model type chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:45:47, skipping insertion in model container [2021-02-19 17:45:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:45:47" (2/2) ... [2021-02-19 17:45:47,525 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-trans.wvr.bpl [2021-02-19 17:45:47,528 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:45:47,529 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:45:47,531 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:45:47,531 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:45:47,552 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 17:45:47,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 17:45:47,572 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:45:47,572 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:45:47,572 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:45:47,573 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:45:47,573 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:45:47,573 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:45:47,573 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:45:47,573 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:45:47,578 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-02-19 17:45:47,594 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:47,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:47,601 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,601 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash 676983671, now seen corresponding path program 1 times [2021-02-19 17:45:47,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550934045] [2021-02-19 17:45:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550934045] [2021-02-19 17:45:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94232630] [2021-02-19 17:45:47,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:47,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:47,753 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:47,798 INFO L93 Difference]: Finished difference Result 194 states and 539 transitions. [2021-02-19 17:45:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:47,810 INFO L225 Difference]: With dead ends: 194 [2021-02-19 17:45:47,810 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:45:47,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:45:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-02-19 17:45:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8761061946902653) internal successors, (325), 113 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 325 transitions. [2021-02-19 17:45:47,845 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 325 transitions. Word has length 17 [2021-02-19 17:45:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:47,846 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 325 transitions. [2021-02-19 17:45:47,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 325 transitions. [2021-02-19 17:45:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:47,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:47,847 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:45:47,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1424816817, now seen corresponding path program 2 times [2021-02-19 17:45:47,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657617709] [2021-02-19 17:45:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657617709] [2021-02-19 17:45:47,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:47,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:47,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912014976] [2021-02-19 17:45:47,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:47,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:47,899 INFO L87 Difference]: Start difference. First operand 114 states and 325 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:47,924 INFO L93 Difference]: Finished difference Result 193 states and 552 transitions. [2021-02-19 17:45:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:47,928 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:45:47,928 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:45:47,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:45:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-02-19 17:45:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-02-19 17:45:47,953 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-02-19 17:45:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:47,954 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-02-19 17:45:47,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-02-19 17:45:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:47,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:47,955 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:45:47,955 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1289091161, now seen corresponding path program 3 times [2021-02-19 17:45:47,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114779927] [2021-02-19 17:45:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114779927] [2021-02-19 17:45:47,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:47,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:47,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187135725] [2021-02-19 17:45:47,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:47,992 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,018 INFO L93 Difference]: Finished difference Result 238 states and 687 transitions. [2021-02-19 17:45:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:45:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,020 INFO L225 Difference]: With dead ends: 238 [2021-02-19 17:45:48,020 INFO L226 Difference]: Without dead ends: 238 [2021-02-19 17:45:48,020 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-02-19 17:45:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2021-02-19 17:45:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.939189189189189) internal successors, (435), 148 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 435 transitions. [2021-02-19 17:45:48,028 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 435 transitions. Word has length 17 [2021-02-19 17:45:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,028 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 435 transitions. [2021-02-19 17:45:48,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 435 transitions. [2021-02-19 17:45:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:45:48,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,029 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:45:48,030 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash 559540359, now seen corresponding path program 1 times [2021-02-19 17:45:48,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942650493] [2021-02-19 17:45:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942650493] [2021-02-19 17:45:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:45:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192422755] [2021-02-19 17:45:48,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:45:48,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:45:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:48,070 INFO L87 Difference]: Start difference. First operand 149 states and 435 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-02-19 17:45:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,081 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2021-02-19 17:45:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:45:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-02-19 17:45:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,083 INFO L225 Difference]: With dead ends: 237 [2021-02-19 17:45:48,083 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:45:48,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:45:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:45:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-02-19 17:45:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-02-19 17:45:48,098 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 18 [2021-02-19 17:45:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,099 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-02-19 17:45:48,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-02-19 17:45:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-02-19 17:45:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,103 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,103 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:45:48,103 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1120496210, now seen corresponding path program 1 times [2021-02-19 17:45:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801418702] [2021-02-19 17:45:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801418702] [2021-02-19 17:45:48,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209682988] [2021-02-19 17:45:48,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,144 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,164 INFO L93 Difference]: Finished difference Result 199 states and 585 transitions. [2021-02-19 17:45:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,166 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:45:48,166 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:45:48,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:45:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:45:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-02-19 17:45:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9545454545454546) internal successors, (585), 198 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 585 transitions. [2021-02-19 17:45:48,171 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 585 transitions. Word has length 19 [2021-02-19 17:45:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 585 transitions. [2021-02-19 17:45:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 585 transitions. [2021-02-19 17:45:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,172 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,172 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:45:48,172 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash -939393514, now seen corresponding path program 2 times [2021-02-19 17:45:48,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777429791] [2021-02-19 17:45:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777429791] [2021-02-19 17:45:48,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64217091] [2021-02-19 17:45:48,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,232 INFO L87 Difference]: Start difference. First operand 199 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,275 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2021-02-19 17:45:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,277 INFO L225 Difference]: With dead ends: 303 [2021-02-19 17:45:48,277 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 17:45:48,278 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:45:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 17:45:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2021-02-19 17:45:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9902439024390244) internal successors, (613), 205 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 613 transitions. [2021-02-19 17:45:48,284 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 613 transitions. Word has length 19 [2021-02-19 17:45:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,285 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 613 transitions. [2021-02-19 17:45:48,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 613 transitions. [2021-02-19 17:45:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,285 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,285 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:45:48,286 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1995801614, now seen corresponding path program 3 times [2021-02-19 17:45:48,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822933823] [2021-02-19 17:45:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822933823] [2021-02-19 17:45:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046809484] [2021-02-19 17:45:48,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,350 INFO L87 Difference]: Start difference. First operand 206 states and 613 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,380 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2021-02-19 17:45:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,382 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:45:48,382 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:45:48,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:45:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:45:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-02-19 17:45:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9560975609756097) internal successors, (606), 205 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 606 transitions. [2021-02-19 17:45:48,387 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 606 transitions. Word has length 19 [2021-02-19 17:45:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,387 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 606 transitions. [2021-02-19 17:45:48,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 606 transitions. [2021-02-19 17:45:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,388 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:45:48,388 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash -938315150, now seen corresponding path program 4 times [2021-02-19 17:45:48,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514228929] [2021-02-19 17:45:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514228929] [2021-02-19 17:45:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405327090] [2021-02-19 17:45:48,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,445 INFO L87 Difference]: Start difference. First operand 206 states and 606 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,486 INFO L93 Difference]: Finished difference Result 301 states and 859 transitions. [2021-02-19 17:45:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,487 INFO L225 Difference]: With dead ends: 301 [2021-02-19 17:45:48,487 INFO L226 Difference]: Without dead ends: 301 [2021-02-19 17:45:48,489 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:45:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-02-19 17:45:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2021-02-19 17:45:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.995305164319249) internal successors, (638), 213 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 638 transitions. [2021-02-19 17:45:48,494 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 638 transitions. Word has length 19 [2021-02-19 17:45:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,494 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 638 transitions. [2021-02-19 17:45:48,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 638 transitions. [2021-02-19 17:45:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,494 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:45:48,495 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1996879978, now seen corresponding path program 5 times [2021-02-19 17:45:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459407124] [2021-02-19 17:45:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459407124] [2021-02-19 17:45:48,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666180918] [2021-02-19 17:45:48,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,536 INFO L87 Difference]: Start difference. First operand 214 states and 638 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,572 INFO L93 Difference]: Finished difference Result 314 states and 878 transitions. [2021-02-19 17:45:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,573 INFO L225 Difference]: With dead ends: 314 [2021-02-19 17:45:48,573 INFO L226 Difference]: Without dead ends: 301 [2021-02-19 17:45:48,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:45:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-02-19 17:45:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2021-02-19 17:45:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9611650485436893) internal successors, (610), 206 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 610 transitions. [2021-02-19 17:45:48,578 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 610 transitions. Word has length 19 [2021-02-19 17:45:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,578 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 610 transitions. [2021-02-19 17:45:48,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 610 transitions. [2021-02-19 17:45:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,579 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:45:48,579 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1225001938, now seen corresponding path program 6 times [2021-02-19 17:45:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255330303] [2021-02-19 17:45:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255330303] [2021-02-19 17:45:48,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404422271] [2021-02-19 17:45:48,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,599 INFO L87 Difference]: Start difference. First operand 207 states and 610 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,615 INFO L93 Difference]: Finished difference Result 231 states and 656 transitions. [2021-02-19 17:45:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,618 INFO L225 Difference]: With dead ends: 231 [2021-02-19 17:45:48,618 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:45:48,619 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:45:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:45:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-02-19 17:45:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-02-19 17:45:48,623 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-02-19 17:45:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,623 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-02-19 17:45:48,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-02-19 17:45:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,624 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:45:48,624 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1811372325, now seen corresponding path program 1 times [2021-02-19 17:45:48,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787106188] [2021-02-19 17:45:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787106188] [2021-02-19 17:45:48,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087859896] [2021-02-19 17:45:48,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,649 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,673 INFO L93 Difference]: Finished difference Result 213 states and 621 transitions. [2021-02-19 17:45:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:45:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,674 INFO L225 Difference]: With dead ends: 213 [2021-02-19 17:45:48,674 INFO L226 Difference]: Without dead ends: 213 [2021-02-19 17:45:48,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:45:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-02-19 17:45:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2021-02-19 17:45:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-02-19 17:45:48,678 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-02-19 17:45:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,679 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-02-19 17:45:48,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-02-19 17:45:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:45:48,679 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,679 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:45:48,680 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1895849649, now seen corresponding path program 2 times [2021-02-19 17:45:48,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679082902] [2021-02-19 17:45:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:45:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679082902] [2021-02-19 17:45:48,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:45:48,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:45:48,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460582010] [2021-02-19 17:45:48,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:45:48,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:48,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:45:48,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:45:48,716 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:48,757 INFO L93 Difference]: Finished difference Result 231 states and 675 transitions. [2021-02-19 17:45:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:45:48,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:45:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:48,758 INFO L225 Difference]: With dead ends: 231 [2021-02-19 17:45:48,758 INFO L226 Difference]: Without dead ends: 231 [2021-02-19 17:45:48,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:45:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-02-19 17:45:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 189. [2021-02-19 17:45:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-02-19 17:45:48,762 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-02-19 17:45:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:48,762 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-02-19 17:45:48,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-02-19 17:45:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:48,763 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:48,763 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:48,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:45:48,763 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1302854453, now seen corresponding path program 1 times [2021-02-19 17:45:48,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:48,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366356628] [2021-02-19 17:45:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366356628] [2021-02-19 17:45:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937015341] [2021-02-19 17:45:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:49,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,113 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 19 treesize of output 15 [2021-02-19 17:45:49,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,118 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 26 treesize of output 20 [2021-02-19 17:45:49,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:49,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:63 [2021-02-19 17:45:49,427 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_3], 1=[o_2, v_prenex_2]} [2021-02-19 17:45:49,430 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 30 treesize of output 24 [2021-02-19 17:45:49,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:49,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,474 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 23 treesize of output 11 [2021-02-19 17:45:49,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,492 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 12 treesize of output 5 [2021-02-19 17:45:49,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:49,510 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-02-19 17:45:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:49,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404402646] [2021-02-19 17:45:49,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:49,574 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:50,263 INFO L93 Difference]: Finished difference Result 444 states and 1299 transitions. [2021-02-19 17:45:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:45:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:50,265 INFO L225 Difference]: With dead ends: 444 [2021-02-19 17:45:50,265 INFO L226 Difference]: Without dead ends: 429 [2021-02-19 17:45:50,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:45:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-02-19 17:45:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 211. [2021-02-19 17:45:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-02-19 17:45:50,271 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 20 [2021-02-19 17:45:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:50,271 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-02-19 17:45:50,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-02-19 17:45:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:50,272 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:50,272 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:50,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 17:45:50,489 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1817908015, now seen corresponding path program 2 times [2021-02-19 17:45:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:50,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517439540] [2021-02-19 17:45:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:50,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517439540] [2021-02-19 17:45:50,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561153172] [2021-02-19 17:45:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:50,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,748 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 19 treesize of output 15 [2021-02-19 17:45:50,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,752 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 26 treesize of output 20 [2021-02-19 17:45:50,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:50,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:69 [2021-02-19 17:45:50,930 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_6], 1=[o_2, v_prenex_5]} [2021-02-19 17:45:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:50,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:50,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,974 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 23 treesize of output 11 [2021-02-19 17:45:50,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:50,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:50,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:50,992 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 12 treesize of output 5 [2021-02-19 17:45:50,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:51,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:51,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:51,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-02-19 17:45:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:51,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:51,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019002745] [2021-02-19 17:45:51,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:51,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:51,075 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:51,711 INFO L93 Difference]: Finished difference Result 365 states and 1066 transitions. [2021-02-19 17:45:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:45:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:51,714 INFO L225 Difference]: With dead ends: 365 [2021-02-19 17:45:51,714 INFO L226 Difference]: Without dead ends: 350 [2021-02-19 17:45:51,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:45:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-02-19 17:45:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 217. [2021-02-19 17:45:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.912037037037037) internal successors, (629), 216 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 629 transitions. [2021-02-19 17:45:51,720 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 629 transitions. Word has length 20 [2021-02-19 17:45:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:51,720 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 629 transitions. [2021-02-19 17:45:51,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 629 transitions. [2021-02-19 17:45:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:51,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:51,721 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:51,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 17:45:51,938 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1367909659, now seen corresponding path program 3 times [2021-02-19 17:45:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:51,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981805738] [2021-02-19 17:45:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:52,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981805738] [2021-02-19 17:45:52,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676439609] [2021-02-19 17:45:52,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:52,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:52,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:52,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,180 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 26 treesize of output 20 [2021-02-19 17:45:52,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,185 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 19 treesize of output 15 [2021-02-19 17:45:52,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:52,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:69 [2021-02-19 17:45:52,276 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_9, o_4], 1=[v_prenex_8, o_2]} [2021-02-19 17:45:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:52,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,300 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 30 treesize of output 24 [2021-02-19 17:45:52,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,321 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 12 treesize of output 5 [2021-02-19 17:45:52,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,340 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 23 treesize of output 11 [2021-02-19 17:45:52,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:52,360 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:87, output treesize:33 [2021-02-19 17:45:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:52,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:52,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032651590] [2021-02-19 17:45:52,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:52,465 INFO L87 Difference]: Start difference. First operand 217 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:53,054 INFO L93 Difference]: Finished difference Result 364 states and 1058 transitions. [2021-02-19 17:45:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:45:53,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:53,056 INFO L225 Difference]: With dead ends: 364 [2021-02-19 17:45:53,056 INFO L226 Difference]: Without dead ends: 349 [2021-02-19 17:45:53,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:45:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-02-19 17:45:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 215. [2021-02-19 17:45:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9065420560747666) internal successors, (622), 214 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 622 transitions. [2021-02-19 17:45:53,062 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 622 transitions. Word has length 20 [2021-02-19 17:45:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:53,062 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 622 transitions. [2021-02-19 17:45:53,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 622 transitions. [2021-02-19 17:45:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:53,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:53,064 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:53,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:45:53,272 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1874255925, now seen corresponding path program 4 times [2021-02-19 17:45:53,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:53,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458240278] [2021-02-19 17:45:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458240278] [2021-02-19 17:45:53,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111554708] [2021-02-19 17:45:53,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:53,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:53,495 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 19 treesize of output 15 [2021-02-19 17:45:53,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 17:45:53,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:53,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:59 [2021-02-19 17:45:53,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,586 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 30 treesize of output 24 [2021-02-19 17:45:53,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:53,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,616 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 23 treesize of output 11 [2021-02-19 17:45:53,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,621 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 12 treesize of output 5 [2021-02-19 17:45:53,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:53,640 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-02-19 17:45:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:53,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817909818] [2021-02-19 17:45:53,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:53,754 INFO L87 Difference]: Start difference. First operand 215 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:54,433 INFO L93 Difference]: Finished difference Result 370 states and 1065 transitions. [2021-02-19 17:45:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:45:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:54,435 INFO L225 Difference]: With dead ends: 370 [2021-02-19 17:45:54,435 INFO L226 Difference]: Without dead ends: 340 [2021-02-19 17:45:54,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:45:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-02-19 17:45:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 224. [2021-02-19 17:45:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.9103139013452917) internal successors, (649), 223 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 649 transitions. [2021-02-19 17:45:54,439 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 649 transitions. Word has length 20 [2021-02-19 17:45:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:54,439 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 649 transitions. [2021-02-19 17:45:54,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 649 transitions. [2021-02-19 17:45:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:54,440 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:54,440 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:54,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:54,650 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash -98205271, now seen corresponding path program 5 times [2021-02-19 17:45:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:54,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088218692] [2021-02-19 17:45:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088218692] [2021-02-19 17:45:54,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256270580] [2021-02-19 17:45:54,762 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) [2021-02-19 17:45:54,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:54,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:54,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,837 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 19 treesize of output 15 [2021-02-19 17:45:54,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,841 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 19 treesize of output 15 [2021-02-19 17:45:54,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:54,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-02-19 17:45:55,181 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_14], 1=[o_2, v_prenex_13]} [2021-02-19 17:45:55,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:55,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,202 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 30 treesize of output 24 [2021-02-19 17:45:55,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:55,220 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 12 treesize of output 5 [2021-02-19 17:45:55,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:55,236 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 23 treesize of output 11 [2021-02-19 17:45:55,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:55,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:55,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:55,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-02-19 17:45:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:55,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:55,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:55,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802353751] [2021-02-19 17:45:55,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:55,316 INFO L87 Difference]: Start difference. First operand 224 states and 649 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:56,287 INFO L93 Difference]: Finished difference Result 586 states and 1696 transitions. [2021-02-19 17:45:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:45:56,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:56,290 INFO L225 Difference]: With dead ends: 586 [2021-02-19 17:45:56,291 INFO L226 Difference]: Without dead ends: 556 [2021-02-19 17:45:56,291 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:45:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-02-19 17:45:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 238. [2021-02-19 17:45:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9957805907172994) internal successors, (710), 237 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-02-19 17:45:56,297 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 20 [2021-02-19 17:45:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:56,297 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-02-19 17:45:56,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-02-19 17:45:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:56,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:56,297 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:56,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:45:56,503 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 683755503, now seen corresponding path program 6 times [2021-02-19 17:45:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:56,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279418484] [2021-02-19 17:45:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:56,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279418484] [2021-02-19 17:45:56,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014611440] [2021-02-19 17:45:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:56,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:45:56,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,788 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 19 treesize of output 15 [2021-02-19 17:45:56,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,793 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 19 treesize of output 15 [2021-02-19 17:45:56,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:56,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:45:57,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,298 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 30 treesize of output 24 [2021-02-19 17:45:57,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:57,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,350 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 23 treesize of output 11 [2021-02-19 17:45:57,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,376 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 12 treesize of output 5 [2021-02-19 17:45:57,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:57,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-02-19 17:45:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:57,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:57,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:57,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676708925] [2021-02-19 17:45:57,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:57,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:57,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:57,470 INFO L87 Difference]: Start difference. First operand 238 states and 710 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:58,028 INFO L93 Difference]: Finished difference Result 382 states and 1125 transitions. [2021-02-19 17:45:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:45:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:58,029 INFO L225 Difference]: With dead ends: 382 [2021-02-19 17:45:58,029 INFO L226 Difference]: Without dead ends: 367 [2021-02-19 17:45:58,030 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-02-19 17:45:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 245. [2021-02-19 17:45:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.0204918032786887) internal successors, (737), 244 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 737 transitions. [2021-02-19 17:45:58,034 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 737 transitions. Word has length 20 [2021-02-19 17:45:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:58,034 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 737 transitions. [2021-02-19 17:45:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 737 transitions. [2021-02-19 17:45:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:58,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:58,035 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:58,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:58,249 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1792905125, now seen corresponding path program 7 times [2021-02-19 17:45:58,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:58,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979814069] [2021-02-19 17:45:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:58,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979814069] [2021-02-19 17:45:58,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082671612] [2021-02-19 17:45:58,395 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) [2021-02-19 17:45:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:45:58,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:58,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:58,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,541 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 19 treesize of output 15 [2021-02-19 17:45:58,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:45:58,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:45:58,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:58,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,889 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 12 treesize of output 5 [2021-02-19 17:45:58,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,919 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 30 treesize of output 24 [2021-02-19 17:45:58,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:58,946 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 23 treesize of output 11 [2021-02-19 17:45:58,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:58,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:58,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:45:58,970 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:99, output treesize:33 [2021-02-19 17:45:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:59,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:59,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:45:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125889476] [2021-02-19 17:45:59,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:45:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:45:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:59,064 INFO L87 Difference]: Start difference. First operand 245 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:59,609 INFO L93 Difference]: Finished difference Result 388 states and 1138 transitions. [2021-02-19 17:45:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:45:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:45:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:59,611 INFO L225 Difference]: With dead ends: 388 [2021-02-19 17:45:59,611 INFO L226 Difference]: Without dead ends: 373 [2021-02-19 17:45:59,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-02-19 17:45:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 243. [2021-02-19 17:45:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0165289256198347) internal successors, (730), 242 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 730 transitions. [2021-02-19 17:45:59,617 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 730 transitions. Word has length 20 [2021-02-19 17:45:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:59,618 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 730 transitions. [2021-02-19 17:45:59,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:45:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 730 transitions. [2021-02-19 17:45:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:45:59,618 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:59,618 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:59,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:59,835 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1675477201, now seen corresponding path program 8 times [2021-02-19 17:45:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:59,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471697366] [2021-02-19 17:45:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471697366] [2021-02-19 17:45:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739736423] [2021-02-19 17:45:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:00,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:00,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,130 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 19 treesize of output 15 [2021-02-19 17:46:00,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,141 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 19 treesize of output 15 [2021-02-19 17:46:00,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:00,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:46:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:00,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,416 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 12 treesize of output 5 [2021-02-19 17:46:00,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:00,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,485 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 12 treesize of output 5 [2021-02-19 17:46:00,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:00,512 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:97, output treesize:38 [2021-02-19 17:46:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:00,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:00,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781297667] [2021-02-19 17:46:00,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:00,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:00,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:00,598 INFO L87 Difference]: Start difference. First operand 243 states and 730 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:01,099 INFO L93 Difference]: Finished difference Result 383 states and 1140 transitions. [2021-02-19 17:46:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:01,101 INFO L225 Difference]: With dead ends: 383 [2021-02-19 17:46:01,101 INFO L226 Difference]: Without dead ends: 368 [2021-02-19 17:46:01,101 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-02-19 17:46:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 240. [2021-02-19 17:46:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.00836820083682) internal successors, (719), 239 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 719 transitions. [2021-02-19 17:46:01,106 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 719 transitions. Word has length 20 [2021-02-19 17:46:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:01,106 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 719 transitions. [2021-02-19 17:46:01,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 719 transitions. [2021-02-19 17:46:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:01,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:01,106 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:01,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-02-19 17:46:01,326 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1765361859, now seen corresponding path program 9 times [2021-02-19 17:46:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:01,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924338791] [2021-02-19 17:46:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924338791] [2021-02-19 17:46:01,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255187475] [2021-02-19 17:46:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:01,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:01,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,596 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 19 treesize of output 15 [2021-02-19 17:46:01,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,600 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 19 treesize of output 15 [2021-02-19 17:46:01,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:01,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:46:01,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:01,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:01,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:01,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,823 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 12 treesize of output 5 [2021-02-19 17:46:01,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:01,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:107, output treesize:44 [2021-02-19 17:46:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:01,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:01,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970648204] [2021-02-19 17:46:01,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:01,972 INFO L87 Difference]: Start difference. First operand 240 states and 719 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:02,310 INFO L93 Difference]: Finished difference Result 341 states and 998 transitions. [2021-02-19 17:46:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:02,311 INFO L225 Difference]: With dead ends: 341 [2021-02-19 17:46:02,311 INFO L226 Difference]: Without dead ends: 326 [2021-02-19 17:46:02,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-02-19 17:46:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 239. [2021-02-19 17:46:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.0) internal successors, (714), 238 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 714 transitions. [2021-02-19 17:46:02,316 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 714 transitions. Word has length 20 [2021-02-19 17:46:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:02,316 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 714 transitions. [2021-02-19 17:46:02,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 714 transitions. [2021-02-19 17:46:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:02,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:02,316 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:02,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:02,518 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash 497904681, now seen corresponding path program 10 times [2021-02-19 17:46:02,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:02,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927990427] [2021-02-19 17:46:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:02,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927990427] [2021-02-19 17:46:02,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465128815] [2021-02-19 17:46:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:02,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:02,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:02,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:02,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,826 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 19 treesize of output 15 [2021-02-19 17:46:02,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:02,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:02,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:02,925 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:46:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:02,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:02,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,972 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 12 treesize of output 5 [2021-02-19 17:46:02,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:02,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:02,976 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 12 treesize of output 5 [2021-02-19 17:46:02,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:03,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:03,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:03,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:44 [2021-02-19 17:46:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:03,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:03,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463311901] [2021-02-19 17:46:03,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:03,123 INFO L87 Difference]: Start difference. First operand 239 states and 714 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:03,696 INFO L93 Difference]: Finished difference Result 387 states and 1152 transitions. [2021-02-19 17:46:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:03,698 INFO L225 Difference]: With dead ends: 387 [2021-02-19 17:46:03,698 INFO L226 Difference]: Without dead ends: 372 [2021-02-19 17:46:03,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-02-19 17:46:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 242. [2021-02-19 17:46:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.012448132780083) internal successors, (726), 241 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 726 transitions. [2021-02-19 17:46:03,702 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 726 transitions. Word has length 20 [2021-02-19 17:46:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:03,702 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 726 transitions. [2021-02-19 17:46:03,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 726 transitions. [2021-02-19 17:46:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:03,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:03,703 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:03,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:03,910 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1305076421, now seen corresponding path program 11 times [2021-02-19 17:46:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:03,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171847021] [2021-02-19 17:46:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171847021] [2021-02-19 17:46:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101419701] [2021-02-19 17:46:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:04,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:04,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:04,078 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 19 treesize of output 15 [2021-02-19 17:46:04,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,081 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 19 treesize of output 15 [2021-02-19 17:46:04,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:04,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:04,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:46:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:04,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,198 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 30 treesize of output 24 [2021-02-19 17:46:04,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:04,210 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:04,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:04,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:04,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131628202] [2021-02-19 17:46:04,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:04,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:04,266 INFO L87 Difference]: Start difference. First operand 242 states and 726 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:05,076 INFO L93 Difference]: Finished difference Result 518 states and 1551 transitions. [2021-02-19 17:46:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:46:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:05,078 INFO L225 Difference]: With dead ends: 518 [2021-02-19 17:46:05,078 INFO L226 Difference]: Without dead ends: 488 [2021-02-19 17:46:05,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:46:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-02-19 17:46:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 246. [2021-02-19 17:46:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-02-19 17:46:05,083 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-02-19 17:46:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:05,083 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-02-19 17:46:05,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-02-19 17:46:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:05,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:05,084 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:05,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 17:46:05,300 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:05,301 INFO L82 PathProgramCache]: Analyzing trace with hash 16361827, now seen corresponding path program 12 times [2021-02-19 17:46:05,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:05,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779060317] [2021-02-19 17:46:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779060317] [2021-02-19 17:46:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259375358] [2021-02-19 17:46:05,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:05,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:05,466 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 19 treesize of output 15 [2021-02-19 17:46:05,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,469 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 19 treesize of output 15 [2021-02-19 17:46:05,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:05,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:46:05,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:05,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,544 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 30 treesize of output 24 [2021-02-19 17:46:05,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:05,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:05,554 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:05,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:05,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:05,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:05,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417082813] [2021-02-19 17:46:05,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:05,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:05,601 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:05,886 INFO L93 Difference]: Finished difference Result 359 states and 1070 transitions. [2021-02-19 17:46:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:05,887 INFO L225 Difference]: With dead ends: 359 [2021-02-19 17:46:05,887 INFO L226 Difference]: Without dead ends: 344 [2021-02-19 17:46:05,888 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-02-19 17:46:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 253. [2021-02-19 17:46:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0198412698412698) internal successors, (761), 252 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 761 transitions. [2021-02-19 17:46:05,892 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 761 transitions. Word has length 20 [2021-02-19 17:46:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:05,892 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 761 transitions. [2021-02-19 17:46:05,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 761 transitions. [2021-02-19 17:46:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:05,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:05,893 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:06,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:06,094 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash -249055995, now seen corresponding path program 13 times [2021-02-19 17:46:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:06,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146636710] [2021-02-19 17:46:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:06,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146636710] [2021-02-19 17:46:06,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146789543] [2021-02-19 17:46:06,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:06,272 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 19 treesize of output 15 [2021-02-19 17:46:06,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,275 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 19 treesize of output 15 [2021-02-19 17:46:06,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:06,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:06,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:46:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:06,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:06,348 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:06,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:06,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:06,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-02-19 17:46:06,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:06,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:46:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:06,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:06,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289567605] [2021-02-19 17:46:06,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:06,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:06,443 INFO L87 Difference]: Start difference. First operand 253 states and 761 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:06,684 INFO L93 Difference]: Finished difference Result 380 states and 1139 transitions. [2021-02-19 17:46:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:06,686 INFO L225 Difference]: With dead ends: 380 [2021-02-19 17:46:06,686 INFO L226 Difference]: Without dead ends: 365 [2021-02-19 17:46:06,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-02-19 17:46:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 250. [2021-02-19 17:46:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0120481927710845) internal successors, (750), 249 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-02-19 17:46:06,699 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 20 [2021-02-19 17:46:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:06,699 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-02-19 17:46:06,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-02-19 17:46:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:06,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:06,700 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:06,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-02-19 17:46:06,906 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1897114765, now seen corresponding path program 14 times [2021-02-19 17:46:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:06,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812577516] [2021-02-19 17:46:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:06,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812577516] [2021-02-19 17:46:06,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784241064] [2021-02-19 17:46:06,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:07,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:07,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:07,060 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 19 treesize of output 15 [2021-02-19 17:46:07,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:46:07,078 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 20 treesize of output 16 [2021-02-19 17:46:07,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,081 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 20 treesize of output 16 [2021-02-19 17:46:07,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,096 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:07,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:07,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:46:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:07,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915354191] [2021-02-19 17:46:07,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:07,171 INFO L87 Difference]: Start difference. First operand 250 states and 750 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:07,427 INFO L93 Difference]: Finished difference Result 369 states and 1107 transitions. [2021-02-19 17:46:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:07,428 INFO L225 Difference]: With dead ends: 369 [2021-02-19 17:46:07,428 INFO L226 Difference]: Without dead ends: 354 [2021-02-19 17:46:07,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-02-19 17:46:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 263. [2021-02-19 17:46:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-02-19 17:46:07,433 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-02-19 17:46:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:07,433 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-02-19 17:46:07,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-02-19 17:46:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:07,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:07,433 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:07,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:07,646 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash 961973679, now seen corresponding path program 15 times [2021-02-19 17:46:07,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:07,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835120941] [2021-02-19 17:46:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:07,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835120941] [2021-02-19 17:46:07,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291957737] [2021-02-19 17:46:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:07,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:07,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:07,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:07,838 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 19 treesize of output 15 [2021-02-19 17:46:07,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,841 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 19 treesize of output 15 [2021-02-19 17:46:07,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:07,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:07,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,958 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 30 treesize of output 24 [2021-02-19 17:46:07,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:07,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:07,968 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:07,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:07,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:08,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:08,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680624463] [2021-02-19 17:46:08,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:08,016 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:08,348 INFO L93 Difference]: Finished difference Result 397 states and 1174 transitions. [2021-02-19 17:46:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:08,350 INFO L225 Difference]: With dead ends: 397 [2021-02-19 17:46:08,350 INFO L226 Difference]: Without dead ends: 382 [2021-02-19 17:46:08,350 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-02-19 17:46:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 269. [2021-02-19 17:46:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0261194029850746) internal successors, (811), 268 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 811 transitions. [2021-02-19 17:46:08,354 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 811 transitions. Word has length 20 [2021-02-19 17:46:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:08,355 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 811 transitions. [2021-02-19 17:46:08,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 811 transitions. [2021-02-19 17:46:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:08,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:08,355 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:08,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-02-19 17:46:08,570 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2071123301, now seen corresponding path program 16 times [2021-02-19 17:46:08,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:08,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798665687] [2021-02-19 17:46:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798665687] [2021-02-19 17:46:08,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574751242] [2021-02-19 17:46:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:08,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:08,738 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 19 treesize of output 15 [2021-02-19 17:46:08,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,741 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 19 treesize of output 15 [2021-02-19 17:46:08,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:08,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:08,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:08,820 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 30 treesize of output 24 [2021-02-19 17:46:08,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:08,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:08,835 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:08,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:08,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:46:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:08,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590029237] [2021-02-19 17:46:08,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:08,915 INFO L87 Difference]: Start difference. First operand 269 states and 811 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:09,189 INFO L93 Difference]: Finished difference Result 391 states and 1161 transitions. [2021-02-19 17:46:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:09,191 INFO L225 Difference]: With dead ends: 391 [2021-02-19 17:46:09,191 INFO L226 Difference]: Without dead ends: 376 [2021-02-19 17:46:09,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-02-19 17:46:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 267. [2021-02-19 17:46:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0225563909774436) internal successors, (804), 266 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 804 transitions. [2021-02-19 17:46:09,196 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 804 transitions. Word has length 20 [2021-02-19 17:46:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:09,196 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 804 transitions. [2021-02-19 17:46:09,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 804 transitions. [2021-02-19 17:46:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:09,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:09,196 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:09,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:09,410 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:09,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1397259025, now seen corresponding path program 17 times [2021-02-19 17:46:09,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:09,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097162027] [2021-02-19 17:46:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097162027] [2021-02-19 17:46:09,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616757908] [2021-02-19 17:46:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:09,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:09,590 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 19 treesize of output 15 [2021-02-19 17:46:09,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,594 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 19 treesize of output 15 [2021-02-19 17:46:09,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:09,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:09,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:09,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:09,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:09,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:09,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:09,726 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:09,726 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-02-19 17:46:09,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:09,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:46:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:09,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:09,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:09,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614464879] [2021-02-19 17:46:09,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:09,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:09,808 INFO L87 Difference]: Start difference. First operand 267 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:10,115 INFO L93 Difference]: Finished difference Result 412 states and 1226 transitions. [2021-02-19 17:46:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:10,117 INFO L225 Difference]: With dead ends: 412 [2021-02-19 17:46:10,117 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 17:46:10,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 17:46:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 264. [2021-02-19 17:46:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0152091254752853) internal successors, (793), 263 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-02-19 17:46:10,129 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 20 [2021-02-19 17:46:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:10,129 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-02-19 17:46:10,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-02-19 17:46:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:10,129 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:10,129 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:10,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-02-19 17:46:10,344 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2043580035, now seen corresponding path program 18 times [2021-02-19 17:46:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494593533] [2021-02-19 17:46:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494593533] [2021-02-19 17:46:10,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749803603] [2021-02-19 17:46:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:10,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:10,522 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 19 treesize of output 15 [2021-02-19 17:46:10,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,525 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 19 treesize of output 15 [2021-02-19 17:46:10,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:10,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:10,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,618 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:10,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:10,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-02-19 17:46:10,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:10,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:46:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:10,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:10,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004459969] [2021-02-19 17:46:10,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:10,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:10,744 INFO L87 Difference]: Start difference. First operand 264 states and 793 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:11,020 INFO L93 Difference]: Finished difference Result 409 states and 1215 transitions. [2021-02-19 17:46:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:11,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:11,022 INFO L225 Difference]: With dead ends: 409 [2021-02-19 17:46:11,022 INFO L226 Difference]: Without dead ends: 394 [2021-02-19 17:46:11,022 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-02-19 17:46:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 263. [2021-02-19 17:46:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-02-19 17:46:11,027 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-02-19 17:46:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:11,027 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-02-19 17:46:11,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-02-19 17:46:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:11,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:11,028 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:11,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:11,242 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -561444357, now seen corresponding path program 19 times [2021-02-19 17:46:11,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:11,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445235016] [2021-02-19 17:46:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445235016] [2021-02-19 17:46:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169297673] [2021-02-19 17:46:11,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:11,398 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 19 treesize of output 15 [2021-02-19 17:46:11,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:11,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:46:11,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:11,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,425 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 20 treesize of output 16 [2021-02-19 17:46:11,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:11,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:11,443 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:11,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:11,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:46:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:11,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:11,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:11,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3287119] [2021-02-19 17:46:11,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:11,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:11,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:11,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:11,568 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:11,834 INFO L93 Difference]: Finished difference Result 385 states and 1149 transitions. [2021-02-19 17:46:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:11,836 INFO L225 Difference]: With dead ends: 385 [2021-02-19 17:46:11,836 INFO L226 Difference]: Without dead ends: 370 [2021-02-19 17:46:11,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-02-19 17:46:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 263. [2021-02-19 17:46:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-02-19 17:46:11,840 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-02-19 17:46:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:11,840 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-02-19 17:46:11,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-02-19 17:46:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:11,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:11,841 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:12,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-02-19 17:46:12,050 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -791862075, now seen corresponding path program 20 times [2021-02-19 17:46:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:12,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984541553] [2021-02-19 17:46:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984541553] [2021-02-19 17:46:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827933202] [2021-02-19 17:46:12,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:12,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:12,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,293 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 19 treesize of output 15 [2021-02-19 17:46:12,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,297 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 19 treesize of output 15 [2021-02-19 17:46:12,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:12,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:46:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,684 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 30 treesize of output 24 [2021-02-19 17:46:12,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,709 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:12,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,732 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 12 treesize of output 5 [2021-02-19 17:46:12,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:12,753 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 23 treesize of output 11 [2021-02-19 17:46:12,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:12,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:12,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:12,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-02-19 17:46:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:12,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802771834] [2021-02-19 17:46:12,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:12,832 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:13,402 INFO L93 Difference]: Finished difference Result 417 states and 1231 transitions. [2021-02-19 17:46:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:13,404 INFO L225 Difference]: With dead ends: 417 [2021-02-19 17:46:13,404 INFO L226 Difference]: Without dead ends: 402 [2021-02-19 17:46:13,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-02-19 17:46:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 269. [2021-02-19 17:46:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0261194029850746) internal successors, (811), 268 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 811 transitions. [2021-02-19 17:46:13,408 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 811 transitions. Word has length 20 [2021-02-19 17:46:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:13,408 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 811 transitions. [2021-02-19 17:46:13,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 811 transitions. [2021-02-19 17:46:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:13,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:13,409 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:13,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-02-19 17:46:13,618 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash 317287547, now seen corresponding path program 21 times [2021-02-19 17:46:13,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:13,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486270352] [2021-02-19 17:46:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:13,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486270352] [2021-02-19 17:46:13,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683391069] [2021-02-19 17:46:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:13,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:13,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,872 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 19 treesize of output 15 [2021-02-19 17:46:13,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:13,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:13,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:13,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:13,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:46:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:14,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,204 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 30 treesize of output 24 [2021-02-19 17:46:14,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,230 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 23 treesize of output 11 [2021-02-19 17:46:14,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:14,254 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 12 treesize of output 5 [2021-02-19 17:46:14,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:14,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:14,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:14,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:99, output treesize:33 [2021-02-19 17:46:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:14,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:14,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:14,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963819387] [2021-02-19 17:46:14,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:14,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:14,366 INFO L87 Difference]: Start difference. First operand 269 states and 811 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:14,935 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-02-19 17:46:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:14,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:14,937 INFO L225 Difference]: With dead ends: 423 [2021-02-19 17:46:14,937 INFO L226 Difference]: Without dead ends: 408 [2021-02-19 17:46:14,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-02-19 17:46:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 267. [2021-02-19 17:46:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0225563909774436) internal successors, (804), 266 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 804 transitions. [2021-02-19 17:46:14,941 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 804 transitions. Word has length 20 [2021-02-19 17:46:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:14,941 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 804 transitions. [2021-02-19 17:46:14,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 804 transitions. [2021-02-19 17:46:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:14,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:14,942 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:15,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:15,142 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1143872517, now seen corresponding path program 22 times [2021-02-19 17:46:15,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:15,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125764041] [2021-02-19 17:46:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125764041] [2021-02-19 17:46:15,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13425550] [2021-02-19 17:46:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:15,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,397 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 19 treesize of output 15 [2021-02-19 17:46:15,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,403 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 19 treesize of output 15 [2021-02-19 17:46:15,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:15,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:46:15,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:15,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:15,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,724 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 12 treesize of output 5 [2021-02-19 17:46:15,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,753 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 12 treesize of output 5 [2021-02-19 17:46:15,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:15,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:97, output treesize:41 [2021-02-19 17:46:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:15,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:15,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069235176] [2021-02-19 17:46:15,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:15,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:15,863 INFO L87 Difference]: Start difference. First operand 267 states and 804 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:16,323 INFO L93 Difference]: Finished difference Result 418 states and 1246 transitions. [2021-02-19 17:46:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:16,325 INFO L225 Difference]: With dead ends: 418 [2021-02-19 17:46:16,325 INFO L226 Difference]: Without dead ends: 403 [2021-02-19 17:46:16,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-19 17:46:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 264. [2021-02-19 17:46:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0152091254752853) internal successors, (793), 263 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-02-19 17:46:16,330 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 20 [2021-02-19 17:46:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:16,330 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-02-19 17:46:16,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-02-19 17:46:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:16,330 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:16,330 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:16,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:16,544 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash 289744281, now seen corresponding path program 23 times [2021-02-19 17:46:16,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:16,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648484384] [2021-02-19 17:46:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648484384] [2021-02-19 17:46:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222748516] [2021-02-19 17:46:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:16,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:16,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:16,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,805 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 19 treesize of output 15 [2021-02-19 17:46:16,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,809 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 19 treesize of output 15 [2021-02-19 17:46:16,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:16,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:16,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:97, output treesize:83 [2021-02-19 17:46:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:16,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:16,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:16,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:16,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:16,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:16,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:17,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:17,024 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 12 treesize of output 5 [2021-02-19 17:46:17,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:17,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:17,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:17,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:101, output treesize:41 [2021-02-19 17:46:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:17,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:17,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593001860] [2021-02-19 17:46:17,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:17,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:17,160 INFO L87 Difference]: Start difference. First operand 264 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:17,603 INFO L93 Difference]: Finished difference Result 434 states and 1288 transitions. [2021-02-19 17:46:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:17,604 INFO L225 Difference]: With dead ends: 434 [2021-02-19 17:46:17,604 INFO L226 Difference]: Without dead ends: 419 [2021-02-19 17:46:17,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-02-19 17:46:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 263. [2021-02-19 17:46:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0076335877862594) internal successors, (788), 262 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 788 transitions. [2021-02-19 17:46:17,609 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 788 transitions. Word has length 20 [2021-02-19 17:46:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:17,609 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 788 transitions. [2021-02-19 17:46:17,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 788 transitions. [2021-02-19 17:46:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:17,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:17,609 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:17,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-02-19 17:46:17,822 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -977712897, now seen corresponding path program 24 times [2021-02-19 17:46:17,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:17,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187387026] [2021-02-19 17:46:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187387026] [2021-02-19 17:46:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003750837] [2021-02-19 17:46:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:17,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,054 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 19 treesize of output 15 [2021-02-19 17:46:18,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:18,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,085 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 19 treesize of output 15 [2021-02-19 17:46:18,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:18,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:18,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:18,178 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:46:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:18,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:18,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,221 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 12 treesize of output 5 [2021-02-19 17:46:18,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:18,224 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 12 treesize of output 5 [2021-02-19 17:46:18,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:18,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:18,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:18,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:47 [2021-02-19 17:46:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:18,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:18,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:18,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82939014] [2021-02-19 17:46:18,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:18,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:18,367 INFO L87 Difference]: Start difference. First operand 263 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:18,865 INFO L93 Difference]: Finished difference Result 412 states and 1225 transitions. [2021-02-19 17:46:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:18,867 INFO L225 Difference]: With dead ends: 412 [2021-02-19 17:46:18,867 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 17:46:18,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 17:46:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 259. [2021-02-19 17:46:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-02-19 17:46:18,871 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-02-19 17:46:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:18,871 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-02-19 17:46:18,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-02-19 17:46:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:18,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:18,872 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:19,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:19,082 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash 693227251, now seen corresponding path program 25 times [2021-02-19 17:46:19,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:19,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124779835] [2021-02-19 17:46:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124779835] [2021-02-19 17:46:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569426834] [2021-02-19 17:46:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:19,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,298 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 19 treesize of output 15 [2021-02-19 17:46:19,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,302 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 19 treesize of output 15 [2021-02-19 17:46:19,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:19,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:19,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:19,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,893 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 30 treesize of output 24 [2021-02-19 17:46:19,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,914 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 23 treesize of output 11 [2021-02-19 17:46:19,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,933 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 12 treesize of output 5 [2021-02-19 17:46:19,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:19,951 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-02-19 17:46:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:20,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:20,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:20,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478910274] [2021-02-19 17:46:20,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:20,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:20,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:20,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:20,008 INFO L87 Difference]: Start difference. First operand 259 states and 772 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:20,423 INFO L93 Difference]: Finished difference Result 355 states and 1054 transitions. [2021-02-19 17:46:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:20,425 INFO L225 Difference]: With dead ends: 355 [2021-02-19 17:46:20,425 INFO L226 Difference]: Without dead ends: 340 [2021-02-19 17:46:20,425 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-02-19 17:46:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 269. [2021-02-19 17:46:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0111940298507465) internal successors, (807), 268 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 807 transitions. [2021-02-19 17:46:20,429 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 807 transitions. Word has length 20 [2021-02-19 17:46:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:20,429 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 807 transitions. [2021-02-19 17:46:20,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 807 transitions. [2021-02-19 17:46:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:20,430 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:20,430 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:20,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-02-19 17:46:20,642 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1802376873, now seen corresponding path program 26 times [2021-02-19 17:46:20,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:20,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994368874] [2021-02-19 17:46:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994368874] [2021-02-19 17:46:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854104420] [2021-02-19 17:46:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:20,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:20,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,864 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 19 treesize of output 15 [2021-02-19 17:46:20,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,867 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 19 treesize of output 15 [2021-02-19 17:46:20,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:20,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:20,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:21,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:21,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,173 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 30 treesize of output 24 [2021-02-19 17:46:21,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,198 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 12 treesize of output 5 [2021-02-19 17:46:21,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:21,220 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 23 treesize of output 11 [2021-02-19 17:46:21,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:21,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:21,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:33 [2021-02-19 17:46:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904939719] [2021-02-19 17:46:21,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:21,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:21,323 INFO L87 Difference]: Start difference. First operand 269 states and 807 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:21,677 INFO L93 Difference]: Finished difference Result 361 states and 1067 transitions. [2021-02-19 17:46:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:21,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:21,679 INFO L225 Difference]: With dead ends: 361 [2021-02-19 17:46:21,679 INFO L226 Difference]: Without dead ends: 346 [2021-02-19 17:46:21,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-02-19 17:46:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 267. [2021-02-19 17:46:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.007518796992481) internal successors, (800), 266 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 800 transitions. [2021-02-19 17:46:21,683 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 800 transitions. Word has length 20 [2021-02-19 17:46:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:21,683 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 800 transitions. [2021-02-19 17:46:21,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 800 transitions. [2021-02-19 17:46:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:21,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:21,684 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:21,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:21,894 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1666005453, now seen corresponding path program 27 times [2021-02-19 17:46:21,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:21,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481014979] [2021-02-19 17:46:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:22,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481014979] [2021-02-19 17:46:22,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738321838] [2021-02-19 17:46:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:22,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:22,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:22,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,104 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 19 treesize of output 15 [2021-02-19 17:46:22,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,108 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 19 treesize of output 15 [2021-02-19 17:46:22,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:22,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:22,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,440 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 12 treesize of output 5 [2021-02-19 17:46:22,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:22,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:22,500 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 12 treesize of output 5 [2021-02-19 17:46:22,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:22,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:22,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:22,525 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:35 [2021-02-19 17:46:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31582696] [2021-02-19 17:46:22,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:22,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:22,611 INFO L87 Difference]: Start difference. First operand 267 states and 800 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:22,952 INFO L93 Difference]: Finished difference Result 376 states and 1119 transitions. [2021-02-19 17:46:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:22,954 INFO L225 Difference]: With dead ends: 376 [2021-02-19 17:46:22,954 INFO L226 Difference]: Without dead ends: 361 [2021-02-19 17:46:22,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-02-19 17:46:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 264. [2021-02-19 17:46:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0) internal successors, (789), 263 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 789 transitions. [2021-02-19 17:46:22,958 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 789 transitions. Word has length 20 [2021-02-19 17:46:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:22,958 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 789 transitions. [2021-02-19 17:46:22,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 789 transitions. [2021-02-19 17:46:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:22,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:22,959 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:23,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-02-19 17:46:23,173 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1774833607, now seen corresponding path program 28 times [2021-02-19 17:46:23,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:23,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853736977] [2021-02-19 17:46:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853736977] [2021-02-19 17:46:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917963681] [2021-02-19 17:46:23,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:23,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:23,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:23,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:23,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,389 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 19 treesize of output 15 [2021-02-19 17:46:23,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:23,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:79 [2021-02-19 17:46:23,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:23,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:23,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:23,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:23,605 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 12 treesize of output 5 [2021-02-19 17:46:23,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:23,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:23,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:23,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:97, output treesize:41 [2021-02-19 17:46:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:23,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:23,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646039018] [2021-02-19 17:46:23,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:23,739 INFO L87 Difference]: Start difference. First operand 264 states and 789 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:24,040 INFO L93 Difference]: Finished difference Result 392 states and 1161 transitions. [2021-02-19 17:46:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:24,042 INFO L225 Difference]: With dead ends: 392 [2021-02-19 17:46:24,042 INFO L226 Difference]: Without dead ends: 377 [2021-02-19 17:46:24,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-02-19 17:46:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 263. [2021-02-19 17:46:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.9923664122137406) internal successors, (784), 262 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 784 transitions. [2021-02-19 17:46:24,046 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 784 transitions. Word has length 20 [2021-02-19 17:46:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:24,046 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 784 transitions. [2021-02-19 17:46:24,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 784 transitions. [2021-02-19 17:46:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:24,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:24,047 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:24,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-02-19 17:46:24,261 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash -625257559, now seen corresponding path program 29 times [2021-02-19 17:46:24,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:24,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214235403] [2021-02-19 17:46:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214235403] [2021-02-19 17:46:24,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350976740] [2021-02-19 17:46:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:24,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,490 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 19 treesize of output 15 [2021-02-19 17:46:24,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:24,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:24,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:24,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-02-19 17:46:24,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,528 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 20 treesize of output 16 [2021-02-19 17:46:24,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:24,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,532 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 20 treesize of output 16 [2021-02-19 17:46:24,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:24,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,573 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 12 treesize of output 5 [2021-02-19 17:46:24,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:24,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:24,576 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 12 treesize of output 5 [2021-02-19 17:46:24,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:24,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:24,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:24,605 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:95, output treesize:35 [2021-02-19 17:46:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:24,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:24,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356852832] [2021-02-19 17:46:24,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:24,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:24,685 INFO L87 Difference]: Start difference. First operand 263 states and 784 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:24,979 INFO L93 Difference]: Finished difference Result 365 states and 1091 transitions. [2021-02-19 17:46:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:24,980 INFO L225 Difference]: With dead ends: 365 [2021-02-19 17:46:24,981 INFO L226 Difference]: Without dead ends: 350 [2021-02-19 17:46:24,981 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-02-19 17:46:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 260. [2021-02-19 17:46:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-02-19 17:46:24,985 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 20 [2021-02-19 17:46:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:24,985 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-02-19 17:46:24,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-02-19 17:46:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:24,985 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:24,985 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:25,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-02-19 17:46:25,200 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash -830190785, now seen corresponding path program 30 times [2021-02-19 17:46:25,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:25,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091823727] [2021-02-19 17:46:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091823727] [2021-02-19 17:46:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168231705] [2021-02-19 17:46:25,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:25,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:25,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,405 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 19 treesize of output 15 [2021-02-19 17:46:25,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:25,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:25,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-02-19 17:46:25,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:25,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,449 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 20 treesize of output 16 [2021-02-19 17:46:25,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:25,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,485 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 12 treesize of output 5 [2021-02-19 17:46:25,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,488 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 12 treesize of output 5 [2021-02-19 17:46:25,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:25,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:25,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:95, output treesize:41 [2021-02-19 17:46:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:25,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934267392] [2021-02-19 17:46:25,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:25,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:25,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:25,624 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:25,960 INFO L93 Difference]: Finished difference Result 391 states and 1159 transitions. [2021-02-19 17:46:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:25,962 INFO L225 Difference]: With dead ends: 391 [2021-02-19 17:46:25,962 INFO L226 Difference]: Without dead ends: 376 [2021-02-19 17:46:25,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-02-19 17:46:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 259. [2021-02-19 17:46:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.992248062015504) internal successors, (772), 258 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 772 transitions. [2021-02-19 17:46:25,966 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 772 transitions. Word has length 20 [2021-02-19 17:46:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:25,966 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 772 transitions. [2021-02-19 17:46:25,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 772 transitions. [2021-02-19 17:46:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:25,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:25,967 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:26,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:26,170 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash 875241513, now seen corresponding path program 31 times [2021-02-19 17:46:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:26,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431890884] [2021-02-19 17:46:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431890884] [2021-02-19 17:46:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014910414] [2021-02-19 17:46:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,347 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 19 treesize of output 15 [2021-02-19 17:46:26,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,359 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 19 treesize of output 15 [2021-02-19 17:46:26,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:26,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:26,390 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:26,542 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:46:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,547 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 30 treesize of output 24 [2021-02-19 17:46:26,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:26,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,581 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 23 treesize of output 11 [2021-02-19 17:46:26,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:26,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:26,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:26,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:26,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:33 [2021-02-19 17:46:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:26,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:26,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896600225] [2021-02-19 17:46:26,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:26,694 INFO L87 Difference]: Start difference. First operand 259 states and 772 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:27,044 INFO L93 Difference]: Finished difference Result 367 states and 1088 transitions. [2021-02-19 17:46:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:27,045 INFO L225 Difference]: With dead ends: 367 [2021-02-19 17:46:27,045 INFO L226 Difference]: Without dead ends: 352 [2021-02-19 17:46:27,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-02-19 17:46:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 265. [2021-02-19 17:46:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.003787878787879) internal successors, (793), 264 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 793 transitions. [2021-02-19 17:46:27,049 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 793 transitions. Word has length 20 [2021-02-19 17:46:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:27,050 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 793 transitions. [2021-02-19 17:46:27,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 793 transitions. [2021-02-19 17:46:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:27,050 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:27,050 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:27,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-02-19 17:46:27,264 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -129090425, now seen corresponding path program 32 times [2021-02-19 17:46:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107520803] [2021-02-19 17:46:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:27,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107520803] [2021-02-19 17:46:27,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823903613] [2021-02-19 17:46:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:27,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:27,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:46:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:27,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,448 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 19 treesize of output 15 [2021-02-19 17:46:27,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:27,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-02-19 17:46:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:27,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:27,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:15 [2021-02-19 17:46:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:27,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:27,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:27,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214260659] [2021-02-19 17:46:27,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:27,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:27,570 INFO L87 Difference]: Start difference. First operand 265 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:27,804 INFO L93 Difference]: Finished difference Result 359 states and 1056 transitions. [2021-02-19 17:46:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:27,806 INFO L225 Difference]: With dead ends: 359 [2021-02-19 17:46:27,806 INFO L226 Difference]: Without dead ends: 344 [2021-02-19 17:46:27,806 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-02-19 17:46:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 262. [2021-02-19 17:46:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-02-19 17:46:27,810 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-02-19 17:46:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:27,810 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-02-19 17:46:27,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-02-19 17:46:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:27,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:27,811 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:28,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-02-19 17:46:28,025 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1466657639, now seen corresponding path program 33 times [2021-02-19 17:46:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:28,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038223728] [2021-02-19 17:46:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038223728] [2021-02-19 17:46:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906792264] [2021-02-19 17:46:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:28,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,191 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 19 treesize of output 15 [2021-02-19 17:46:28,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:28,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:28,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-02-19 17:46:28,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,230 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 20 treesize of output 16 [2021-02-19 17:46:28,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,233 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 20 treesize of output 16 [2021-02-19 17:46:28,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:28,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:28,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:28,275 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 12 treesize of output 5 [2021-02-19 17:46:28,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:28,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:28,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:28,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:41 [2021-02-19 17:46:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:28,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:28,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727403359] [2021-02-19 17:46:28,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:28,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:28,429 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:28,710 INFO L93 Difference]: Finished difference Result 323 states and 954 transitions. [2021-02-19 17:46:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:28,711 INFO L225 Difference]: With dead ends: 323 [2021-02-19 17:46:28,711 INFO L226 Difference]: Without dead ends: 308 [2021-02-19 17:46:28,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-02-19 17:46:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 262. [2021-02-19 17:46:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.992337164750958) internal successors, (781), 261 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 781 transitions. [2021-02-19 17:46:28,715 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 781 transitions. Word has length 20 [2021-02-19 17:46:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:28,715 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 781 transitions. [2021-02-19 17:46:28,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 781 transitions. [2021-02-19 17:46:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:28,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:28,716 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:28,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-02-19 17:46:28,934 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2081462393, now seen corresponding path program 34 times [2021-02-19 17:46:28,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:28,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968131184] [2021-02-19 17:46:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968131184] [2021-02-19 17:46:29,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455750925] [2021-02-19 17:46:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:29,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:29,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:29,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:29,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:29,066 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 19 treesize of output 15 [2021-02-19 17:46:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:29,069 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 19 treesize of output 15 [2021-02-19 17:46:29,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:29,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:29,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:29,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:46:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:29,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:29,185 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 30 treesize of output 24 [2021-02-19 17:46:29,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:29,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:29,207 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:29,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:29,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:29,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:29,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053736680] [2021-02-19 17:46:29,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:29,258 INFO L87 Difference]: Start difference. First operand 262 states and 781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:30,333 INFO L93 Difference]: Finished difference Result 691 states and 2049 transitions. [2021-02-19 17:46:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:46:30,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:30,335 INFO L225 Difference]: With dead ends: 691 [2021-02-19 17:46:30,335 INFO L226 Difference]: Without dead ends: 661 [2021-02-19 17:46:30,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:46:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-02-19 17:46:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 280. [2021-02-19 17:46:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.982078853046595) internal successors, (832), 279 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 832 transitions. [2021-02-19 17:46:30,340 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 832 transitions. Word has length 20 [2021-02-19 17:46:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 832 transitions. [2021-02-19 17:46:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 832 transitions. [2021-02-19 17:46:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:30,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:30,341 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:30,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-02-19 17:46:30,550 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1120728793, now seen corresponding path program 35 times [2021-02-19 17:46:30,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:30,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717966370] [2021-02-19 17:46:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717966370] [2021-02-19 17:46:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961752040] [2021-02-19 17:46:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:30,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:30,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:30,675 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 19 treesize of output 15 [2021-02-19 17:46:30,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:30,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-02-19 17:46:30,697 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 20 treesize of output 16 [2021-02-19 17:46:30,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,700 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 20 treesize of output 16 [2021-02-19 17:46:30,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:30,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:30,719 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:30,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:30,720 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:46:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:30,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546049421] [2021-02-19 17:46:30,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:30,799 INFO L87 Difference]: Start difference. First operand 280 states and 832 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:31,113 INFO L93 Difference]: Finished difference Result 525 states and 1555 transitions. [2021-02-19 17:46:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:31,118 INFO L225 Difference]: With dead ends: 525 [2021-02-19 17:46:31,118 INFO L226 Difference]: Without dead ends: 510 [2021-02-19 17:46:31,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-02-19 17:46:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 272. [2021-02-19 17:46:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.981549815498155) internal successors, (808), 271 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 808 transitions. [2021-02-19 17:46:31,123 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 808 transitions. Word has length 20 [2021-02-19 17:46:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:31,123 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 808 transitions. [2021-02-19 17:46:31,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 808 transitions. [2021-02-19 17:46:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:31,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:31,123 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:31,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:31,324 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:31,324 INFO L82 PathProgramCache]: Analyzing trace with hash 49791111, now seen corresponding path program 36 times [2021-02-19 17:46:31,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:31,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739687582] [2021-02-19 17:46:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739687582] [2021-02-19 17:46:31,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564364489] [2021-02-19 17:46:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:31,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:31,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:31,449 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 19 treesize of output 15 [2021-02-19 17:46:31,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,452 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 19 treesize of output 15 [2021-02-19 17:46:31,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:31,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:31,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:46:31,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:31,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,533 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 30 treesize of output 24 [2021-02-19 17:46:31,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:31,545 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:31,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:31,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:31,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:31,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999297450] [2021-02-19 17:46:31,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:31,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:31,594 INFO L87 Difference]: Start difference. First operand 272 states and 808 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:31,985 INFO L93 Difference]: Finished difference Result 541 states and 1597 transitions. [2021-02-19 17:46:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:31,987 INFO L225 Difference]: With dead ends: 541 [2021-02-19 17:46:31,987 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:46:31,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:46:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 287. [2021-02-19 17:46:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9965034965034967) internal successors, (857), 286 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 857 transitions. [2021-02-19 17:46:31,992 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 857 transitions. Word has length 20 [2021-02-19 17:46:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:31,992 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 857 transitions. [2021-02-19 17:46:31,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 857 transitions. [2021-02-19 17:46:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:31,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:31,992 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:32,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:32,206 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash -215626711, now seen corresponding path program 37 times [2021-02-19 17:46:32,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:32,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955166579] [2021-02-19 17:46:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955166579] [2021-02-19 17:46:32,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486065107] [2021-02-19 17:46:32,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:32,335 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 19 treesize of output 15 [2021-02-19 17:46:32,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,338 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 19 treesize of output 15 [2021-02-19 17:46:32,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:32,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:32,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:46:32,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:32,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:32,407 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:32,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:32,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-02-19 17:46:32,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:32,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:46:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:32,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:32,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416494047] [2021-02-19 17:46:32,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:32,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:32,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:32,497 INFO L87 Difference]: Start difference. First operand 287 states and 857 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:32,890 INFO L93 Difference]: Finished difference Result 562 states and 1662 transitions. [2021-02-19 17:46:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:32,891 INFO L225 Difference]: With dead ends: 562 [2021-02-19 17:46:32,891 INFO L226 Difference]: Without dead ends: 547 [2021-02-19 17:46:32,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-02-19 17:46:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 283. [2021-02-19 17:46:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.982269503546099) internal successors, (841), 282 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 841 transitions. [2021-02-19 17:46:32,896 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 841 transitions. Word has length 20 [2021-02-19 17:46:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:32,896 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 841 transitions. [2021-02-19 17:46:32,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 841 transitions. [2021-02-19 17:46:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:32,897 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:32,897 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:33,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-02-19 17:46:33,108 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1930544049, now seen corresponding path program 38 times [2021-02-19 17:46:33,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:33,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983607274] [2021-02-19 17:46:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983607274] [2021-02-19 17:46:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906971313] [2021-02-19 17:46:33,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:33,235 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 19 treesize of output 15 [2021-02-19 17:46:33,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-02-19 17:46:33,257 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 20 treesize of output 16 [2021-02-19 17:46:33,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,260 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 20 treesize of output 16 [2021-02-19 17:46:33,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,276 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:33,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:33,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:46:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:33,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:33,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106566405] [2021-02-19 17:46:33,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:33,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:33,351 INFO L87 Difference]: Start difference. First operand 283 states and 841 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:33,679 INFO L93 Difference]: Finished difference Result 551 states and 1634 transitions. [2021-02-19 17:46:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:33,681 INFO L225 Difference]: With dead ends: 551 [2021-02-19 17:46:33,681 INFO L226 Difference]: Without dead ends: 536 [2021-02-19 17:46:33,681 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-02-19 17:46:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 279. [2021-02-19 17:46:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9820143884892087) internal successors, (829), 278 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 829 transitions. [2021-02-19 17:46:33,685 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 829 transitions. Word has length 20 [2021-02-19 17:46:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:33,685 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 829 transitions. [2021-02-19 17:46:33,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 829 transitions. [2021-02-19 17:46:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:33,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:33,686 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:33,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:33,886 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1858076981, now seen corresponding path program 39 times [2021-02-19 17:46:33,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:33,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880078222] [2021-02-19 17:46:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880078222] [2021-02-19 17:46:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982398122] [2021-02-19 17:46:33,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:33,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:33,997 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 19 treesize of output 15 [2021-02-19 17:46:33,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:34,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 17:46:34,018 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 20 treesize of output 16 [2021-02-19 17:46:34,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:34,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:34,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:34,038 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:34,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:34,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:46:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:34,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:46:34,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127233519] [2021-02-19 17:46:34,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:34,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:34,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:34,133 INFO L87 Difference]: Start difference. First operand 279 states and 829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:34,603 INFO L93 Difference]: Finished difference Result 659 states and 1951 transitions. [2021-02-19 17:46:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:46:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:34,605 INFO L225 Difference]: With dead ends: 659 [2021-02-19 17:46:34,605 INFO L226 Difference]: Without dead ends: 644 [2021-02-19 17:46:34,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-02-19 17:46:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 301. [2021-02-19 17:46:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 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) [2021-02-19 17:46:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2021-02-19 17:46:34,610 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2021-02-19 17:46:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:34,610 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2021-02-19 17:46:34,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2021-02-19 17:46:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:34,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:34,611 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:34,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-02-19 17:46:34,812 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash -239933717, now seen corresponding path program 40 times [2021-02-19 17:46:34,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:34,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978756564] [2021-02-19 17:46:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:34,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978756564] [2021-02-19 17:46:34,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772369503] [2021-02-19 17:46:34,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:34,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:34,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:34,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:34,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:35,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,047 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 19 treesize of output 15 [2021-02-19 17:46:35,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,051 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 26 treesize of output 20 [2021-02-19 17:46:35,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:35,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:35,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:46:35,217 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:35,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,225 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 30 treesize of output 24 [2021-02-19 17:46:35,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,251 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 12 treesize of output 5 [2021-02-19 17:46:35,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:35,254 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 23 treesize of output 11 [2021-02-19 17:46:35,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:35,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:35,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:46:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:35,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:35,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996525141] [2021-02-19 17:46:35,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:35,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:35,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:35,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:35,327 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:35,888 INFO L93 Difference]: Finished difference Result 475 states and 1403 transitions. [2021-02-19 17:46:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:35,889 INFO L225 Difference]: With dead ends: 475 [2021-02-19 17:46:35,889 INFO L226 Difference]: Without dead ends: 460 [2021-02-19 17:46:35,889 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-02-19 17:46:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 309. [2021-02-19 17:46:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9837662337662336) internal successors, (919), 308 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 919 transitions. [2021-02-19 17:46:35,893 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 919 transitions. Word has length 20 [2021-02-19 17:46:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:35,893 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 919 transitions. [2021-02-19 17:46:35,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 919 transitions. [2021-02-19 17:46:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:35,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:35,894 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:36,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:36,108 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash 869215905, now seen corresponding path program 41 times [2021-02-19 17:46:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:36,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807067987] [2021-02-19 17:46:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807067987] [2021-02-19 17:46:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341119829] [2021-02-19 17:46:36,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:36,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:36,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:36,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,369 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 26 treesize of output 20 [2021-02-19 17:46:36,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:36,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:36,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:46:36,469 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:36,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,479 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 30 treesize of output 24 [2021-02-19 17:46:36,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,511 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 12 treesize of output 5 [2021-02-19 17:46:36,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,515 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 23 treesize of output 11 [2021-02-19 17:46:36,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:36,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:36,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:46:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118451527] [2021-02-19 17:46:36,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:36,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:36,633 INFO L87 Difference]: Start difference. First operand 309 states and 919 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:37,171 INFO L93 Difference]: Finished difference Result 481 states and 1416 transitions. [2021-02-19 17:46:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:37,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:37,173 INFO L225 Difference]: With dead ends: 481 [2021-02-19 17:46:37,173 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 17:46:37,173 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 17:46:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 307. [2021-02-19 17:46:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-02-19 17:46:37,177 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-02-19 17:46:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:37,177 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-02-19 17:46:37,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-02-19 17:46:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:37,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:37,178 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:37,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-02-19 17:46:37,378 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:37,379 INFO L82 PathProgramCache]: Analyzing trace with hash 362869639, now seen corresponding path program 42 times [2021-02-19 17:46:37,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:37,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553374947] [2021-02-19 17:46:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553374947] [2021-02-19 17:46:37,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9468263] [2021-02-19 17:46:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:37,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:37,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,629 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 26 treesize of output 20 [2021-02-19 17:46:37,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,633 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 19 treesize of output 15 [2021-02-19 17:46:37,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:37,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:46:37,717 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:46:37,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,721 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:37,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,725 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 30 treesize of output 24 [2021-02-19 17:46:37,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,754 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 12 treesize of output 5 [2021-02-19 17:46:37,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,757 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 23 treesize of output 11 [2021-02-19 17:46:37,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:37,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:46:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:37,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:37,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782825800] [2021-02-19 17:46:37,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:37,868 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:38,404 INFO L93 Difference]: Finished difference Result 481 states and 1420 transitions. [2021-02-19 17:46:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:38,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:38,405 INFO L225 Difference]: With dead ends: 481 [2021-02-19 17:46:38,405 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 17:46:38,405 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 17:46:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 305. [2021-02-19 17:46:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-02-19 17:46:38,409 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-02-19 17:46:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:38,410 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-02-19 17:46:38,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-02-19 17:46:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:38,410 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:38,410 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:38,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:38,624 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1309452723, now seen corresponding path program 43 times [2021-02-19 17:46:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:38,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384014440] [2021-02-19 17:46:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:38,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384014440] [2021-02-19 17:46:38,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508175206] [2021-02-19 17:46:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,826 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 19 treesize of output 15 [2021-02-19 17:46:38,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,829 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 19 treesize of output 15 [2021-02-19 17:46:38,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:38,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:39,090 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:39,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:39,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,097 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 30 treesize of output 24 [2021-02-19 17:46:39,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:39,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,125 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 23 treesize of output 11 [2021-02-19 17:46:39,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:39,129 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 12 treesize of output 5 [2021-02-19 17:46:39,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:39,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:39,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:39,151 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:46:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:39,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:39,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854370161] [2021-02-19 17:46:39,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:39,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:39,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:39,209 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:39,848 INFO L93 Difference]: Finished difference Result 498 states and 1465 transitions. [2021-02-19 17:46:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:39,850 INFO L225 Difference]: With dead ends: 498 [2021-02-19 17:46:39,850 INFO L226 Difference]: Without dead ends: 483 [2021-02-19 17:46:39,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-02-19 17:46:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 311. [2021-02-19 17:46:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-02-19 17:46:39,854 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-02-19 17:46:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:39,854 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-02-19 17:46:39,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:39,854 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-02-19 17:46:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:39,855 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:39,855 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:40,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:40,061 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash -200303101, now seen corresponding path program 44 times [2021-02-19 17:46:40,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:40,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914852181] [2021-02-19 17:46:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914852181] [2021-02-19 17:46:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335403776] [2021-02-19 17:46:40,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:40,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:40,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,286 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 19 treesize of output 15 [2021-02-19 17:46:40,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,290 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 19 treesize of output 15 [2021-02-19 17:46:40,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:40,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:40,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:40,485 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:40,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:40,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,493 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 30 treesize of output 24 [2021-02-19 17:46:40,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:40,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,522 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 12 treesize of output 5 [2021-02-19 17:46:40,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:40,525 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 23 treesize of output 11 [2021-02-19 17:46:40,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:40,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:40,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:40,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:46:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:40,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:40,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:40,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612161062] [2021-02-19 17:46:40,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:40,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:40,638 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:41,192 INFO L93 Difference]: Finished difference Result 504 states and 1478 transitions. [2021-02-19 17:46:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:41,193 INFO L225 Difference]: With dead ends: 504 [2021-02-19 17:46:41,193 INFO L226 Difference]: Without dead ends: 489 [2021-02-19 17:46:41,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-19 17:46:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-02-19 17:46:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9967532467532467) internal successors, (923), 308 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 923 transitions. [2021-02-19 17:46:41,199 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 923 transitions. Word has length 20 [2021-02-19 17:46:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:41,199 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 923 transitions. [2021-02-19 17:46:41,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 923 transitions. [2021-02-19 17:46:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:41,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:41,200 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:41,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-02-19 17:46:41,415 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 626281869, now seen corresponding path program 45 times [2021-02-19 17:46:41,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:41,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412503329] [2021-02-19 17:46:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412503329] [2021-02-19 17:46:41,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34942510] [2021-02-19 17:46:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:41,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:46:41,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:41,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,623 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 19 treesize of output 15 [2021-02-19 17:46:41,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,626 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:41,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:41,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:41,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:41,805 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:41,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:41,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:41,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,844 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 12 treesize of output 5 [2021-02-19 17:46:41,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:41,847 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 12 treesize of output 5 [2021-02-19 17:46:41,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:41,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:41,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:41,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:35 [2021-02-19 17:46:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:41,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:41,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:41,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841252800] [2021-02-19 17:46:41,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:41,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:41,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:41,964 INFO L87 Difference]: Start difference. First operand 309 states and 923 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:42,511 INFO L93 Difference]: Finished difference Result 499 states and 1480 transitions. [2021-02-19 17:46:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:42,512 INFO L225 Difference]: With dead ends: 499 [2021-02-19 17:46:42,512 INFO L226 Difference]: Without dead ends: 484 [2021-02-19 17:46:42,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-02-19 17:46:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 306. [2021-02-19 17:46:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-02-19 17:46:42,517 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-02-19 17:46:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:42,517 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-02-19 17:46:42,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-02-19 17:46:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:42,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:42,517 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:42,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-02-19 17:46:42,718 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash -227846367, now seen corresponding path program 46 times [2021-02-19 17:46:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:42,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290258941] [2021-02-19 17:46:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:42,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290258941] [2021-02-19 17:46:42,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337406413] [2021-02-19 17:46:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:42,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:42,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:42,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,929 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 19 treesize of output 15 [2021-02-19 17:46:42,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:42,932 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 19 treesize of output 15 [2021-02-19 17:46:42,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:42,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:42,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:43,028 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:43,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:43,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,074 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 12 treesize of output 5 [2021-02-19 17:46:43,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,077 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 12 treesize of output 5 [2021-02-19 17:46:43,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:43,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:46:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:43,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:43,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:43,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756558933] [2021-02-19 17:46:43,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:43,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:43,225 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:43,815 INFO L93 Difference]: Finished difference Result 515 states and 1522 transitions. [2021-02-19 17:46:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:43,817 INFO L225 Difference]: With dead ends: 515 [2021-02-19 17:46:43,817 INFO L226 Difference]: Without dead ends: 500 [2021-02-19 17:46:43,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-02-19 17:46:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 305. [2021-02-19 17:46:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-02-19 17:46:43,821 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-02-19 17:46:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:43,821 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-02-19 17:46:43,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-02-19 17:46:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:43,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:43,822 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:44,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:44,022 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash -490971607, now seen corresponding path program 47 times [2021-02-19 17:46:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:44,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044417015] [2021-02-19 17:46:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044417015] [2021-02-19 17:46:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698297318] [2021-02-19 17:46:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:44,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:44,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:44,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,252 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 19 treesize of output 15 [2021-02-19 17:46:44,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,257 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 19 treesize of output 15 [2021-02-19 17:46:44,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:44,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:44,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:44,468 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:46:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:44,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:44,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,510 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 12 treesize of output 5 [2021-02-19 17:46:44,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:44,514 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 23 treesize of output 11 [2021-02-19 17:46:44,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:44,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:44,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:44,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:46:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:44,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:44,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678145612] [2021-02-19 17:46:44,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:44,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:44,636 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:45,222 INFO L93 Difference]: Finished difference Result 501 states and 1473 transitions. [2021-02-19 17:46:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:45,223 INFO L225 Difference]: With dead ends: 501 [2021-02-19 17:46:45,223 INFO L226 Difference]: Without dead ends: 486 [2021-02-19 17:46:45,224 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-19 17:46:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 308. [2021-02-19 17:46:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.993485342019544) internal successors, (919), 307 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 919 transitions. [2021-02-19 17:46:45,228 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 919 transitions. Word has length 20 [2021-02-19 17:46:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:45,228 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 919 transitions. [2021-02-19 17:46:45,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 919 transitions. [2021-02-19 17:46:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:45,229 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:45,229 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:45,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:45,437 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1495303545, now seen corresponding path program 48 times [2021-02-19 17:46:45,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:45,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901444039] [2021-02-19 17:46:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901444039] [2021-02-19 17:46:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898759204] [2021-02-19 17:46:45,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:46:45,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,673 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 19 treesize of output 15 [2021-02-19 17:46:45,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,678 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 19 treesize of output 15 [2021-02-19 17:46:45,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:45,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:45,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:46:45,785 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:46:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:45,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:45,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:45,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,827 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 12 treesize of output 5 [2021-02-19 17:46:45,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:45,830 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 12 treesize of output 5 [2021-02-19 17:46:45,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:45,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:45,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:45,862 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:46:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:45,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:45,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:45,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198606549] [2021-02-19 17:46:45,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:45,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:45,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:45,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:45,978 INFO L87 Difference]: Start difference. First operand 308 states and 919 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:46,513 INFO L93 Difference]: Finished difference Result 505 states and 1497 transitions. [2021-02-19 17:46:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:46:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:46,514 INFO L225 Difference]: With dead ends: 505 [2021-02-19 17:46:46,514 INFO L226 Difference]: Without dead ends: 490 [2021-02-19 17:46:46,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-02-19 17:46:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-02-19 17:46:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 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) [2021-02-19 17:46:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-02-19 17:46:46,519 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-02-19 17:46:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:46,519 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-02-19 17:46:46,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-02-19 17:46:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:46,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:46,520 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:46,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:46,720 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 175636603, now seen corresponding path program 49 times [2021-02-19 17:46:46,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:46,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852995971] [2021-02-19 17:46:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852995971] [2021-02-19 17:46:46,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857916921] [2021-02-19 17:46:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:46,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:46,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,928 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 19 treesize of output 15 [2021-02-19 17:46:46,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:46,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:46,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-02-19 17:46:47,221 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:47,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:47,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,230 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 30 treesize of output 24 [2021-02-19 17:46:47,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,257 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 12 treesize of output 5 [2021-02-19 17:46:47,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,261 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 23 treesize of output 11 [2021-02-19 17:46:47,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:47,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:47,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:27 [2021-02-19 17:46:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:47,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:47,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:47,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130761733] [2021-02-19 17:46:47,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:47,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:47,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:47,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:47,344 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:47,822 INFO L93 Difference]: Finished difference Result 425 states and 1259 transitions. [2021-02-19 17:46:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:47,824 INFO L225 Difference]: With dead ends: 425 [2021-02-19 17:46:47,824 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 17:46:47,824 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 17:46:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 314. [2021-02-19 17:46:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9968051118210863) internal successors, (938), 313 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 938 transitions. [2021-02-19 17:46:47,828 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 938 transitions. Word has length 20 [2021-02-19 17:46:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:47,828 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 938 transitions. [2021-02-19 17:46:47,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 938 transitions. [2021-02-19 17:46:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:47,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:47,829 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:48,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-02-19 17:46:48,029 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1284786225, now seen corresponding path program 50 times [2021-02-19 17:46:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:48,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435000563] [2021-02-19 17:46:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435000563] [2021-02-19 17:46:48,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296139415] [2021-02-19 17:46:48,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:48,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:48,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,214 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 19 treesize of output 15 [2021-02-19 17:46:48,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,217 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 19 treesize of output 15 [2021-02-19 17:46:48,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:48,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-02-19 17:46:48,329 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-02-19 17:46:48,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:48,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,343 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 30 treesize of output 24 [2021-02-19 17:46:48,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,367 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 12 treesize of output 5 [2021-02-19 17:46:48,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,370 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 23 treesize of output 11 [2021-02-19 17:46:48,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:48,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-02-19 17:46:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:48,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:48,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132274512] [2021-02-19 17:46:48,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:48,489 INFO L87 Difference]: Start difference. First operand 314 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:48,908 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-02-19 17:46:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:48,910 INFO L225 Difference]: With dead ends: 431 [2021-02-19 17:46:48,910 INFO L226 Difference]: Without dead ends: 416 [2021-02-19 17:46:48,910 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-02-19 17:46:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 312. [2021-02-19 17:46:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-02-19 17:46:48,914 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-02-19 17:46:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:48,914 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-02-19 17:46:48,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-02-19 17:46:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:48,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:48,914 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:49,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:49,115 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2111371195, now seen corresponding path program 51 times [2021-02-19 17:46:49,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:49,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15757089] [2021-02-19 17:46:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15757089] [2021-02-19 17:46:49,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147519971] [2021-02-19 17:46:49,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:49,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:49,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:49,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,314 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 19 treesize of output 15 [2021-02-19 17:46:49,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,325 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 19 treesize of output 15 [2021-02-19 17:46:49,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:49,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:49,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-02-19 17:46:49,561 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:49,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:49,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:49,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,598 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 12 treesize of output 5 [2021-02-19 17:46:49,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:49,601 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 12 treesize of output 5 [2021-02-19 17:46:49,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:49,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:49,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:49,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:35 [2021-02-19 17:46:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:49,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165467177] [2021-02-19 17:46:49,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:49,718 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:50,161 INFO L93 Difference]: Finished difference Result 446 states and 1324 transitions. [2021-02-19 17:46:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:50,163 INFO L225 Difference]: With dead ends: 446 [2021-02-19 17:46:50,163 INFO L226 Difference]: Without dead ends: 431 [2021-02-19 17:46:50,163 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-02-19 17:46:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 309. [2021-02-19 17:46:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.987012987012987) internal successors, (920), 308 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 920 transitions. [2021-02-19 17:46:50,167 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 920 transitions. Word has length 20 [2021-02-19 17:46:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:50,167 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 920 transitions. [2021-02-19 17:46:50,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 920 transitions. [2021-02-19 17:46:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:50,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:50,168 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:50,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-02-19 17:46:50,383 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1257242959, now seen corresponding path program 52 times [2021-02-19 17:46:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588276588] [2021-02-19 17:46:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588276588] [2021-02-19 17:46:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712334895] [2021-02-19 17:46:50,506 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) [2021-02-19 17:46:50,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:50,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,594 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 19 treesize of output 15 [2021-02-19 17:46:50,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,598 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 19 treesize of output 15 [2021-02-19 17:46:50,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:50,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:46:50,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-02-19 17:46:50,699 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:46:50,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:50,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,709 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:50,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,756 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 12 treesize of output 5 [2021-02-19 17:46:50,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:50,760 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 12 treesize of output 5 [2021-02-19 17:46:50,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:50,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:50,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:50,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:41 [2021-02-19 17:46:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:50,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265390314] [2021-02-19 17:46:50,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:50,908 INFO L87 Difference]: Start difference. First operand 309 states and 920 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:51,211 INFO L93 Difference]: Finished difference Result 396 states and 1158 transitions. [2021-02-19 17:46:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:51,212 INFO L225 Difference]: With dead ends: 396 [2021-02-19 17:46:51,212 INFO L226 Difference]: Without dead ends: 381 [2021-02-19 17:46:51,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-02-19 17:46:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 308. [2021-02-19 17:46:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.980456026058632) internal successors, (915), 307 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 915 transitions. [2021-02-19 17:46:51,216 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 915 transitions. Word has length 20 [2021-02-19 17:46:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:51,216 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 915 transitions. [2021-02-19 17:46:51,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 915 transitions. [2021-02-19 17:46:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:51,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:51,216 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:51,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:51,430 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1142848207, now seen corresponding path program 53 times [2021-02-19 17:46:51,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:51,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498405531] [2021-02-19 17:46:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498405531] [2021-02-19 17:46:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301243807] [2021-02-19 17:46:51,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:51,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:51,635 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 19 treesize of output 15 [2021-02-19 17:46:51,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:51,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:51,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-02-19 17:46:51,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,667 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 20 treesize of output 16 [2021-02-19 17:46:51,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,670 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 20 treesize of output 16 [2021-02-19 17:46:51,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:51,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,697 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 12 treesize of output 5 [2021-02-19 17:46:51,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:51,700 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 12 treesize of output 5 [2021-02-19 17:46:51,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:51,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:51,723 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:35 [2021-02-19 17:46:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:51,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727413509] [2021-02-19 17:46:51,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:51,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:51,805 INFO L87 Difference]: Start difference. First operand 308 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:52,161 INFO L93 Difference]: Finished difference Result 432 states and 1287 transitions. [2021-02-19 17:46:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:52,162 INFO L225 Difference]: With dead ends: 432 [2021-02-19 17:46:52,162 INFO L226 Difference]: Without dead ends: 417 [2021-02-19 17:46:52,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-02-19 17:46:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 305. [2021-02-19 17:46:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9835526315789473) internal successors, (907), 304 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 907 transitions. [2021-02-19 17:46:52,166 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 907 transitions. Word has length 20 [2021-02-19 17:46:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:52,166 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 907 transitions. [2021-02-19 17:46:52,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 907 transitions. [2021-02-19 17:46:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:52,167 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:52,167 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:52,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-02-19 17:46:52,367 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:52,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1347781433, now seen corresponding path program 54 times [2021-02-19 17:46:52,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:52,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882110479] [2021-02-19 17:46:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882110479] [2021-02-19 17:46:52,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160833656] [2021-02-19 17:46:52,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:52,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:52,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:52,576 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 19 treesize of output 15 [2021-02-19 17:46:52,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:52,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:52,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:46:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,617 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 20 treesize of output 16 [2021-02-19 17:46:52,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,621 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 20 treesize of output 16 [2021-02-19 17:46:52,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,658 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 12 treesize of output 5 [2021-02-19 17:46:52,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:52,661 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 12 treesize of output 5 [2021-02-19 17:46:52,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:52,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:52,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:52,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:89, output treesize:41 [2021-02-19 17:46:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:52,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:52,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:52,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241216260] [2021-02-19 17:46:52,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:52,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:52,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:52,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:52,819 INFO L87 Difference]: Start difference. First operand 305 states and 907 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:53,236 INFO L93 Difference]: Finished difference Result 458 states and 1355 transitions. [2021-02-19 17:46:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:46:53,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:53,238 INFO L225 Difference]: With dead ends: 458 [2021-02-19 17:46:53,238 INFO L226 Difference]: Without dead ends: 443 [2021-02-19 17:46:53,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-02-19 17:46:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-02-19 17:46:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.98019801980198) internal successors, (903), 303 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) [2021-02-19 17:46:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 903 transitions. [2021-02-19 17:46:53,242 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 903 transitions. Word has length 20 [2021-02-19 17:46:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:53,243 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 903 transitions. [2021-02-19 17:46:53,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 903 transitions. [2021-02-19 17:46:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:53,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:53,243 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:53,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-02-19 17:46:53,462 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 357650865, now seen corresponding path program 55 times [2021-02-19 17:46:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:53,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391159830] [2021-02-19 17:46:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:53,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391159830] [2021-02-19 17:46:53,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390512296] [2021-02-19 17:46:53,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:53,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,672 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 19 treesize of output 15 [2021-02-19 17:46:53,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,676 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 19 treesize of output 15 [2021-02-19 17:46:53,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:53,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:53,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-02-19 17:46:53,781 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-02-19 17:46:53,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:53,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,788 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 30 treesize of output 24 [2021-02-19 17:46:53,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:53,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,813 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 12 treesize of output 5 [2021-02-19 17:46:53,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:53,816 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 23 treesize of output 11 [2021-02-19 17:46:53,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:53,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:53,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:53,837 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-02-19 17:46:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:53,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:53,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:53,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160512979] [2021-02-19 17:46:53,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:53,931 INFO L87 Difference]: Start difference. First operand 304 states and 903 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:54,346 INFO L93 Difference]: Finished difference Result 441 states and 1304 transitions. [2021-02-19 17:46:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:54,348 INFO L225 Difference]: With dead ends: 441 [2021-02-19 17:46:54,348 INFO L226 Difference]: Without dead ends: 426 [2021-02-19 17:46:54,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-02-19 17:46:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 310. [2021-02-19 17:46:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9902912621359223) internal successors, (924), 309 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 924 transitions. [2021-02-19 17:46:54,352 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 924 transitions. Word has length 20 [2021-02-19 17:46:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:54,352 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 924 transitions. [2021-02-19 17:46:54,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 924 transitions. [2021-02-19 17:46:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:54,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:54,353 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:54,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-02-19 17:46:54,566 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:54,566 INFO L82 PathProgramCache]: Analyzing trace with hash -646681073, now seen corresponding path program 56 times [2021-02-19 17:46:54,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:54,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567562792] [2021-02-19 17:46:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567562792] [2021-02-19 17:46:54,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289626008] [2021-02-19 17:46:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:46:54,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:54,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:54,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:46:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:54,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,777 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 19 treesize of output 15 [2021-02-19 17:46:54,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:54,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-02-19 17:46:54,810 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-02-19 17:46:54,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:54,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:54,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:54,825 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 12 treesize of output 5 [2021-02-19 17:46:54,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:54,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:46:54,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2021-02-19 17:46:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780060355] [2021-02-19 17:46:54,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:54,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:54,914 INFO L87 Difference]: Start difference. First operand 310 states and 924 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:55,130 INFO L93 Difference]: Finished difference Result 430 states and 1264 transitions. [2021-02-19 17:46:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:55,131 INFO L225 Difference]: With dead ends: 430 [2021-02-19 17:46:55,131 INFO L226 Difference]: Without dead ends: 415 [2021-02-19 17:46:55,131 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-02-19 17:46:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 307. [2021-02-19 17:46:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.980392156862745) internal successors, (912), 306 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 912 transitions. [2021-02-19 17:46:55,135 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 912 transitions. Word has length 20 [2021-02-19 17:46:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:55,135 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 912 transitions. [2021-02-19 17:46:55,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 912 transitions. [2021-02-19 17:46:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:55,136 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:55,136 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:55,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:55,336 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1984248287, now seen corresponding path program 57 times [2021-02-19 17:46:55,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:55,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027694235] [2021-02-19 17:46:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:55,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027694235] [2021-02-19 17:46:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343562720] [2021-02-19 17:46:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:55,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:46:55,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:55,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:55,508 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 19 treesize of output 15 [2021-02-19 17:46:55,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:55,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:46:55,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:46:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,544 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 20 treesize of output 16 [2021-02-19 17:46:55,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,548 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 20 treesize of output 16 [2021-02-19 17:46:55,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,580 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 12 treesize of output 5 [2021-02-19 17:46:55,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:55,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:55,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:55,612 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:89, output treesize:41 [2021-02-19 17:46:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:55,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:55,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:46:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612338360] [2021-02-19 17:46:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:46:55,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:55,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:46:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:46:55,728 INFO L87 Difference]: Start difference. First operand 307 states and 912 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:55,969 INFO L93 Difference]: Finished difference Result 368 states and 1085 transitions. [2021-02-19 17:46:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:46:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:55,970 INFO L225 Difference]: With dead ends: 368 [2021-02-19 17:46:55,970 INFO L226 Difference]: Without dead ends: 353 [2021-02-19 17:46:55,971 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-02-19 17:46:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 303. [2021-02-19 17:46:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-02-19 17:46:55,974 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-02-19 17:46:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:55,974 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-02-19 17:46:55,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:46:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-02-19 17:46:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:55,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:55,975 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:56,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:56,175 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash 981875887, now seen corresponding path program 58 times [2021-02-19 17:46:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757604939] [2021-02-19 17:46:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757604939] [2021-02-19 17:46:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872662580] [2021-02-19 17:46:56,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:56,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:56,344 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 19 treesize of output 15 [2021-02-19 17:46:56,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:56,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:56,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:56,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:56,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,469 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 30 treesize of output 24 [2021-02-19 17:46:56,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,480 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:56,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:56,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:46:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:56,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642615706] [2021-02-19 17:46:56,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:56,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:56,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:56,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:56,532 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:56,938 INFO L93 Difference]: Finished difference Result 477 states and 1414 transitions. [2021-02-19 17:46:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:56,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:56,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:56,940 INFO L225 Difference]: With dead ends: 477 [2021-02-19 17:46:56,940 INFO L226 Difference]: Without dead ends: 462 [2021-02-19 17:46:56,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-02-19 17:46:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 320. [2021-02-19 17:46:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9968652037617556) internal successors, (956), 319 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 956 transitions. [2021-02-19 17:46:56,944 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 956 transitions. Word has length 20 [2021-02-19 17:46:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:56,944 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 956 transitions. [2021-02-19 17:46:56,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 956 transitions. [2021-02-19 17:46:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:56,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:56,945 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:57,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-02-19 17:46:57,159 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2091025509, now seen corresponding path program 59 times [2021-02-19 17:46:57,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:57,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361315279] [2021-02-19 17:46:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:57,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361315279] [2021-02-19 17:46:57,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968553956] [2021-02-19 17:46:57,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:57,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:57,336 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 19 treesize of output 15 [2021-02-19 17:46:57,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,339 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 19 treesize of output 15 [2021-02-19 17:46:57,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:57,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:57,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:57,426 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 30 treesize of output 24 [2021-02-19 17:46:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:57,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:57,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:57,443 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:57,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:57,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:46:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:57,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:57,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725996609] [2021-02-19 17:46:57,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:57,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:57,539 INFO L87 Difference]: Start difference. First operand 320 states and 956 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:58,049 INFO L93 Difference]: Finished difference Result 483 states and 1427 transitions. [2021-02-19 17:46:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:58,058 INFO L225 Difference]: With dead ends: 483 [2021-02-19 17:46:58,058 INFO L226 Difference]: Without dead ends: 468 [2021-02-19 17:46:58,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:46:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-19 17:46:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 318. [2021-02-19 17:46:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.993690851735016) internal successors, (949), 317 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 949 transitions. [2021-02-19 17:46:58,063 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 949 transitions. Word has length 20 [2021-02-19 17:46:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:58,063 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 949 transitions. [2021-02-19 17:46:58,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 949 transitions. [2021-02-19 17:46:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:58,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:58,064 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:58,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:58,279 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1377356817, now seen corresponding path program 60 times [2021-02-19 17:46:58,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:58,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727982009] [2021-02-19 17:46:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727982009] [2021-02-19 17:46:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307443784] [2021-02-19 17:46:58,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:58,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:58,468 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 19 treesize of output 15 [2021-02-19 17:46:58,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,470 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 19 treesize of output 15 [2021-02-19 17:46:58,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:58,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:58,494 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:58,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:58,593 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:58,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:58,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:58,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:58,611 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-02-19 17:46:58,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:58,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:46:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:58,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:58,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557994825] [2021-02-19 17:46:58,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:58,693 INFO L87 Difference]: Start difference. First operand 318 states and 949 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:59,188 INFO L93 Difference]: Finished difference Result 498 states and 1479 transitions. [2021-02-19 17:46:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:46:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:46:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:59,189 INFO L225 Difference]: With dead ends: 498 [2021-02-19 17:46:59,189 INFO L226 Difference]: Without dead ends: 483 [2021-02-19 17:46:59,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-02-19 17:46:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 315. [2021-02-19 17:46:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9872611464968153) internal successors, (938), 314 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 938 transitions. [2021-02-19 17:46:59,194 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 938 transitions. Word has length 20 [2021-02-19 17:46:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:59,194 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 938 transitions. [2021-02-19 17:46:59,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 938 transitions. [2021-02-19 17:46:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:46:59,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:59,194 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:59,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:59,409 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2063482243, now seen corresponding path program 61 times [2021-02-19 17:46:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:59,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777251230] [2021-02-19 17:46:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777251230] [2021-02-19 17:46:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996001680] [2021-02-19 17:46:59,497 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:46:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:59,556 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 19 treesize of output 15 [2021-02-19 17:46:59,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:59,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:59,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:59,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:46:59,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:59,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:59,643 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:46:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:59,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:59,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:59,665 INFO L518 ElimStorePlain]: Eliminatee v_prenex_133 vanished before elimination [2021-02-19 17:46:59,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:46:59,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:46:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:59,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:59,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:46:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425719291] [2021-02-19 17:46:59,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:59,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:59,777 INFO L87 Difference]: Start difference. First operand 315 states and 938 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:00,069 INFO L93 Difference]: Finished difference Result 434 states and 1272 transitions. [2021-02-19 17:47:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:00,070 INFO L225 Difference]: With dead ends: 434 [2021-02-19 17:47:00,070 INFO L226 Difference]: Without dead ends: 419 [2021-02-19 17:47:00,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-02-19 17:47:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 314. [2021-02-19 17:47:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9808306709265175) internal successors, (933), 313 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 933 transitions. [2021-02-19 17:47:00,078 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 933 transitions. Word has length 20 [2021-02-19 17:47:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:00,078 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 933 transitions. [2021-02-19 17:47:00,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 933 transitions. [2021-02-19 17:47:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:00,079 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:00,079 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:00,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable837,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:00,279 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash -336608923, now seen corresponding path program 62 times [2021-02-19 17:47:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:00,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332711338] [2021-02-19 17:47:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332711338] [2021-02-19 17:47:00,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052808142] [2021-02-19 17:47:00,383 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:00,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:00,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:00,451 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 19 treesize of output 15 [2021-02-19 17:47:00,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:00,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:47:00,475 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 20 treesize of output 16 [2021-02-19 17:47:00,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,477 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 20 treesize of output 16 [2021-02-19 17:47:00,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:00,494 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:00,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:00,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:47:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:00,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:00,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507082768] [2021-02-19 17:47:00,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:00,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:00,577 INFO L87 Difference]: Start difference. First operand 314 states and 933 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:00,913 INFO L93 Difference]: Finished difference Result 471 states and 1404 transitions. [2021-02-19 17:47:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:00,914 INFO L225 Difference]: With dead ends: 471 [2021-02-19 17:47:00,914 INFO L226 Difference]: Without dead ends: 456 [2021-02-19 17:47:00,914 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-02-19 17:47:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 311. [2021-02-19 17:47:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9838709677419355) internal successors, (925), 310 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 925 transitions. [2021-02-19 17:47:00,918 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 925 transitions. Word has length 20 [2021-02-19 17:47:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:00,918 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 925 transitions. [2021-02-19 17:47:00,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 925 transitions. [2021-02-19 17:47:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:00,919 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:00,919 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:01,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-02-19 17:47:01,120 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:01,120 INFO L82 PathProgramCache]: Analyzing trace with hash -541542149, now seen corresponding path program 63 times [2021-02-19 17:47:01,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:01,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131861010] [2021-02-19 17:47:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131861010] [2021-02-19 17:47:01,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350110237] [2021-02-19 17:47:01,225 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:01,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:01,278 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 19 treesize of output 15 [2021-02-19 17:47:01,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:01,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:47:01,305 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 20 treesize of output 16 [2021-02-19 17:47:01,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,308 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 20 treesize of output 16 [2021-02-19 17:47:01,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:01,329 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:01,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:01,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:47:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:01,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:01,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:01,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791950317] [2021-02-19 17:47:01,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:01,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:01,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:01,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:01,448 INFO L87 Difference]: Start difference. First operand 311 states and 925 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:01,761 INFO L93 Difference]: Finished difference Result 433 states and 1270 transitions. [2021-02-19 17:47:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:01,762 INFO L225 Difference]: With dead ends: 433 [2021-02-19 17:47:01,762 INFO L226 Difference]: Without dead ends: 418 [2021-02-19 17:47:01,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-02-19 17:47:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2021-02-19 17:47:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9805825242718447) internal successors, (921), 309 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 921 transitions. [2021-02-19 17:47:01,766 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 921 transitions. Word has length 20 [2021-02-19 17:47:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:01,766 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 921 transitions. [2021-02-19 17:47:01,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 921 transitions. [2021-02-19 17:47:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:01,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:01,766 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:01,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:01,967 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1552759599, now seen corresponding path program 64 times [2021-02-19 17:47:01,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:01,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642622285] [2021-02-19 17:47:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642622285] [2021-02-19 17:47:02,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392382610] [2021-02-19 17:47:02,052 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:02,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:02,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:02,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:02,100 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 19 treesize of output 15 [2021-02-19 17:47:02,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 17:47:02,117 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 20 treesize of output 16 [2021-02-19 17:47:02,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,120 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 20 treesize of output 16 [2021-02-19 17:47:02,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,137 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:02,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:02,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:47:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:02,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:47:02,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705168132] [2021-02-19 17:47:02,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:02,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:02,217 INFO L87 Difference]: Start difference. First operand 310 states and 921 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:02,562 INFO L93 Difference]: Finished difference Result 579 states and 1721 transitions. [2021-02-19 17:47:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:47:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:02,563 INFO L225 Difference]: With dead ends: 579 [2021-02-19 17:47:02,563 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 17:47:02,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 17:47:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 305. [2021-02-19 17:47:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.986842105263158) internal successors, (908), 304 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 908 transitions. [2021-02-19 17:47:02,568 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 908 transitions. Word has length 20 [2021-02-19 17:47:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:02,568 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 908 transitions. [2021-02-19 17:47:02,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 908 transitions. [2021-02-19 17:47:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:02,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:02,569 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:02,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-02-19 17:47:02,781 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash 94924705, now seen corresponding path program 65 times [2021-02-19 17:47:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:02,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487324889] [2021-02-19 17:47:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487324889] [2021-02-19 17:47:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058324622] [2021-02-19 17:47:02,875 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:02,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:02,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:02,918 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 19 treesize of output 15 [2021-02-19 17:47:02,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:47:02,944 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 20 treesize of output 16 [2021-02-19 17:47:02,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,947 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 20 treesize of output 16 [2021-02-19 17:47:02,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,967 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:02,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:02,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:47:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:47:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980927245] [2021-02-19 17:47:03,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:03,083 INFO L87 Difference]: Start difference. First operand 305 states and 908 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:47:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:03,579 INFO L93 Difference]: Finished difference Result 621 states and 1830 transitions. [2021-02-19 17:47:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 20 [2021-02-19 17:47:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:03,580 INFO L225 Difference]: With dead ends: 621 [2021-02-19 17:47:03,580 INFO L226 Difference]: Without dead ends: 606 [2021-02-19 17:47:03,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-02-19 17:47:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 303. [2021-02-19 17:47:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.980132450331126) internal successors, (900), 302 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 900 transitions. [2021-02-19 17:47:03,585 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 900 transitions. Word has length 20 [2021-02-19 17:47:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:03,585 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 900 transitions. [2021-02-19 17:47:03,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:47:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 900 transitions. [2021-02-19 17:47:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:03,585 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:03,585 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:03,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-02-19 17:47:03,786 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1386713141, now seen corresponding path program 66 times [2021-02-19 17:47:03,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:03,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760032249] [2021-02-19 17:47:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760032249] [2021-02-19 17:47:03,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385001885] [2021-02-19 17:47:03,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:47:03,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:03,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:03,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:03,967 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 19 treesize of output 15 [2021-02-19 17:47:03,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:03,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:03,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:03,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:04,072 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 30 treesize of output 24 [2021-02-19 17:47:04,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:04,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:04,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:04,091 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:04,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:04,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:04,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:04,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:04,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308367435] [2021-02-19 17:47:04,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:04,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:04,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:04,185 INFO L87 Difference]: Start difference. First operand 303 states and 900 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:04,735 INFO L93 Difference]: Finished difference Result 459 states and 1358 transitions. [2021-02-19 17:47:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:04,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:04,736 INFO L225 Difference]: With dead ends: 459 [2021-02-19 17:47:04,736 INFO L226 Difference]: Without dead ends: 444 [2021-02-19 17:47:04,736 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-02-19 17:47:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 315. [2021-02-19 17:47:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9904458598726116) internal successors, (939), 314 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 939 transitions. [2021-02-19 17:47:04,740 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 939 transitions. Word has length 20 [2021-02-19 17:47:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:04,740 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 939 transitions. [2021-02-19 17:47:04,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 939 transitions. [2021-02-19 17:47:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:04,741 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:04,741 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:04,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-02-19 17:47:04,941 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1903922217, now seen corresponding path program 67 times [2021-02-19 17:47:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:04,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109429686] [2021-02-19 17:47:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:05,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109429686] [2021-02-19 17:47:05,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162741485] [2021-02-19 17:47:05,047 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:05,120 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 19 treesize of output 15 [2021-02-19 17:47:05,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,123 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 19 treesize of output 15 [2021-02-19 17:47:05,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:05,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:05,145 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:05,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:05,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:05,210 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:05,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:05,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:05,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:05,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-02-19 17:47:05,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:05,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:47:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:05,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:05,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931790085] [2021-02-19 17:47:05,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:05,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:05,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:05,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:05,359 INFO L87 Difference]: Start difference. First operand 315 states and 939 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:05,835 INFO L93 Difference]: Finished difference Result 474 states and 1407 transitions. [2021-02-19 17:47:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:05,836 INFO L225 Difference]: With dead ends: 474 [2021-02-19 17:47:05,836 INFO L226 Difference]: Without dead ends: 459 [2021-02-19 17:47:05,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-02-19 17:47:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 312. [2021-02-19 17:47:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-02-19 17:47:05,840 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-02-19 17:47:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:05,841 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-02-19 17:47:05,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-02-19 17:47:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:05,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:05,841 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:06,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable871,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:06,052 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash 566355003, now seen corresponding path program 68 times [2021-02-19 17:47:06,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:06,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420190804] [2021-02-19 17:47:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420190804] [2021-02-19 17:47:06,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657021419] [2021-02-19 17:47:06,170 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) [2021-02-19 17:47:06,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:06,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:47:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:06,243 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 19 treesize of output 15 [2021-02-19 17:47:06,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:06,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:47:06,272 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 20 treesize of output 16 [2021-02-19 17:47:06,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:06,279 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:06,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:06,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-02-19 17:47:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:06,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:06,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174806794] [2021-02-19 17:47:06,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:06,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:06,356 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:06,673 INFO L93 Difference]: Finished difference Result 436 states and 1287 transitions. [2021-02-19 17:47:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:06,674 INFO L225 Difference]: With dead ends: 436 [2021-02-19 17:47:06,674 INFO L226 Difference]: Without dead ends: 421 [2021-02-19 17:47:06,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-02-19 17:47:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-02-19 17:47:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-02-19 17:47:06,678 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-02-19 17:47:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:06,678 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-02-19 17:47:06,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-02-19 17:47:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:06,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:06,678 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:06,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:06,879 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1839288711, now seen corresponding path program 69 times [2021-02-19 17:47:06,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:06,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807634712] [2021-02-19 17:47:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:06,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807634712] [2021-02-19 17:47:06,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779874536] [2021-02-19 17:47:06,991 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 [2021-02-19 17:47:07,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:47:07,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:07,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:07,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:07,042 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 19 treesize of output 15 [2021-02-19 17:47:07,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:07,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:47:07,070 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 20 treesize of output 16 [2021-02-19 17:47:07,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,074 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 20 treesize of output 16 [2021-02-19 17:47:07,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:07,097 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:07,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:07,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:47:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:07,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:47:07,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265614576] [2021-02-19 17:47:07,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:07,228 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:47:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:07,697 INFO L93 Difference]: Finished difference Result 557 states and 1655 transitions. [2021-02-19 17:47:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 20 [2021-02-19 17:47:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:07,698 INFO L225 Difference]: With dead ends: 557 [2021-02-19 17:47:07,698 INFO L226 Difference]: Without dead ends: 542 [2021-02-19 17:47:07,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-02-19 17:47:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 309. [2021-02-19 17:47:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9805194805194803) internal successors, (918), 308 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 918 transitions. [2021-02-19 17:47:07,703 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 918 transitions. Word has length 20 [2021-02-19 17:47:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:07,703 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 918 transitions. [2021-02-19 17:47:07,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:47:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 918 transitions. [2021-02-19 17:47:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:07,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:07,703 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:07,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:07,904 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash -944175867, now seen corresponding path program 70 times [2021-02-19 17:47:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:07,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587086150] [2021-02-19 17:47:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587086150] [2021-02-19 17:47:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692012237] [2021-02-19 17:47:07,993 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:08,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:08,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 17:47:08,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,094 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 19 treesize of output 15 [2021-02-19 17:47:08,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:08,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:08,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:43 [2021-02-19 17:47:08,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:08,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:08,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:08,200 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:08,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:08,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:08,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:08,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873582559] [2021-02-19 17:47:08,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:08,258 INFO L87 Difference]: Start difference. First operand 309 states and 918 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:09,577 INFO L93 Difference]: Finished difference Result 844 states and 2508 transitions. [2021-02-19 17:47:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:47:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:09,579 INFO L225 Difference]: With dead ends: 844 [2021-02-19 17:47:09,579 INFO L226 Difference]: Without dead ends: 814 [2021-02-19 17:47:09,579 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:47:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-02-19 17:47:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 315. [2021-02-19 17:47:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9808917197452227) internal successors, (936), 314 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 936 transitions. [2021-02-19 17:47:09,584 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 936 transitions. Word has length 20 [2021-02-19 17:47:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:09,584 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 936 transitions. [2021-02-19 17:47:09,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 936 transitions. [2021-02-19 17:47:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:09,585 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:09,585 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:09,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-02-19 17:47:09,785 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2118380695, now seen corresponding path program 71 times [2021-02-19 17:47:09,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:09,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977603977] [2021-02-19 17:47:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977603977] [2021-02-19 17:47:09,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029394929] [2021-02-19 17:47:09,871 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:09,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:09,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:10,001 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 26 treesize of output 20 [2021-02-19 17:47:10,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,004 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 19 treesize of output 15 [2021-02-19 17:47:10,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:10,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:10,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:10,090 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 30 treesize of output 24 [2021-02-19 17:47:10,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:10,103 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:10,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:10,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:10,116 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-02-19 17:47:10,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:10,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:10,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:10,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515951686] [2021-02-19 17:47:10,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:10,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:10,188 INFO L87 Difference]: Start difference. First operand 315 states and 936 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:11,288 INFO L93 Difference]: Finished difference Result 667 states and 1998 transitions. [2021-02-19 17:47:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:11,289 INFO L225 Difference]: With dead ends: 667 [2021-02-19 17:47:11,289 INFO L226 Difference]: Without dead ends: 637 [2021-02-19 17:47:11,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-02-19 17:47:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 321. [2021-02-19 17:47:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.990625) internal successors, (957), 320 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 957 transitions. [2021-02-19 17:47:11,294 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 957 transitions. Word has length 20 [2021-02-19 17:47:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:11,295 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 957 transitions. [2021-02-19 17:47:11,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 957 transitions. [2021-02-19 17:47:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:11,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:11,295 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:11,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-02-19 17:47:11,496 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1009231073, now seen corresponding path program 72 times [2021-02-19 17:47:11,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:11,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323092932] [2021-02-19 17:47:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:11,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323092932] [2021-02-19 17:47:11,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841888022] [2021-02-19 17:47:11,601 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:11,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:11,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:11,726 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 26 treesize of output 20 [2021-02-19 17:47:11,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,730 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 19 treesize of output 15 [2021-02-19 17:47:11,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:11,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:11,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:11,782 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 30 treesize of output 24 [2021-02-19 17:47:11,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:11,799 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:11,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:11,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-02-19 17:47:11,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:11,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:11,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:11,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:11,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098538424] [2021-02-19 17:47:11,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:11,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:11,921 INFO L87 Difference]: Start difference. First operand 321 states and 957 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:13,125 INFO L93 Difference]: Finished difference Result 667 states and 1988 transitions. [2021-02-19 17:47:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:13,126 INFO L225 Difference]: With dead ends: 667 [2021-02-19 17:47:13,126 INFO L226 Difference]: Without dead ends: 637 [2021-02-19 17:47:13,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-02-19 17:47:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 318. [2021-02-19 17:47:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9810725552050474) internal successors, (945), 317 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 945 transitions. [2021-02-19 17:47:13,131 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 945 transitions. Word has length 20 [2021-02-19 17:47:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:13,131 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 945 transitions. [2021-02-19 17:47:13,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 945 transitions. [2021-02-19 17:47:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:13,132 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:13,132 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:13,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable905,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:13,332 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1515577339, now seen corresponding path program 73 times [2021-02-19 17:47:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:13,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523426295] [2021-02-19 17:47:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:13,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523426295] [2021-02-19 17:47:13,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347492441] [2021-02-19 17:47:13,433 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:13,555 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 19 treesize of output 15 [2021-02-19 17:47:13,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,558 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 26 treesize of output 20 [2021-02-19 17:47:13,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:13,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:13,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:13,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:13,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:13,628 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:13,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:13,644 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-02-19 17:47:13,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:13,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:13,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:13,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:13,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441211504] [2021-02-19 17:47:13,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:13,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:13,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:13,755 INFO L87 Difference]: Start difference. First operand 318 states and 945 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:14,824 INFO L93 Difference]: Finished difference Result 638 states and 1912 transitions. [2021-02-19 17:47:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:14,825 INFO L225 Difference]: With dead ends: 638 [2021-02-19 17:47:14,825 INFO L226 Difference]: Without dead ends: 608 [2021-02-19 17:47:14,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-02-19 17:47:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 312. [2021-02-19 17:47:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9807073954983925) internal successors, (927), 311 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 927 transitions. [2021-02-19 17:47:14,831 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 927 transitions. Word has length 20 [2021-02-19 17:47:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:14,831 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 927 transitions. [2021-02-19 17:47:14,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 927 transitions. [2021-02-19 17:47:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:14,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:14,831 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:15,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:15,032 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash 486643697, now seen corresponding path program 74 times [2021-02-19 17:47:15,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:15,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338741062] [2021-02-19 17:47:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338741062] [2021-02-19 17:47:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900321777] [2021-02-19 17:47:15,117 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:15,234 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 26 treesize of output 20 [2021-02-19 17:47:15,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,237 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 19 treesize of output 15 [2021-02-19 17:47:15,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:15,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:15,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:15,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:15,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:15,340 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:15,342 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 30 treesize of output 24 [2021-02-19 17:47:15,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:15,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:15,353 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-02-19 17:47:15,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:15,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:15,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:15,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49750654] [2021-02-19 17:47:15,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:15,411 INFO L87 Difference]: Start difference. First operand 312 states and 927 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:16,499 INFO L93 Difference]: Finished difference Result 670 states and 2009 transitions. [2021-02-19 17:47:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:16,501 INFO L225 Difference]: With dead ends: 670 [2021-02-19 17:47:16,501 INFO L226 Difference]: Without dead ends: 640 [2021-02-19 17:47:16,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-02-19 17:47:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 322. [2021-02-19 17:47:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2021-02-19 17:47:16,507 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 20 [2021-02-19 17:47:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:16,507 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2021-02-19 17:47:16,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2021-02-19 17:47:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:16,508 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:16,508 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:16,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:16,708 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1595793319, now seen corresponding path program 75 times [2021-02-19 17:47:16,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:16,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713264607] [2021-02-19 17:47:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:16,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713264607] [2021-02-19 17:47:16,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079005800] [2021-02-19 17:47:16,811 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:47:16,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:16,943 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 26 treesize of output 20 [2021-02-19 17:47:16,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:16,946 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 19 treesize of output 15 [2021-02-19 17:47:16,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:16,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:16,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:16,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:17,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:17,016 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:17,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:17,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:17,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_145 vanished before elimination [2021-02-19 17:47:17,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:17,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:17,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:17,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607758990] [2021-02-19 17:47:17,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:17,131 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:18,247 INFO L93 Difference]: Finished difference Result 692 states and 2064 transitions. [2021-02-19 17:47:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:18,248 INFO L225 Difference]: With dead ends: 692 [2021-02-19 17:47:18,248 INFO L226 Difference]: Without dead ends: 662 [2021-02-19 17:47:18,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-02-19 17:47:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 319. [2021-02-19 17:47:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2021-02-19 17:47:18,253 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 20 [2021-02-19 17:47:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:18,253 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2021-02-19 17:47:18,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2021-02-19 17:47:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:18,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:18,254 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:18,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:18,454 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1089447053, now seen corresponding path program 76 times [2021-02-19 17:47:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:18,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686431456] [2021-02-19 17:47:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:18,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686431456] [2021-02-19 17:47:18,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903927591] [2021-02-19 17:47:18,561 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:47:18,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:18,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:18,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,710 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 26 treesize of output 20 [2021-02-19 17:47:18,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:18,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:18,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:47:18,764 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 30 treesize of output 24 [2021-02-19 17:47:18,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:18,780 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:18,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:18,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:18,797 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-02-19 17:47:18,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:18,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:18,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:18,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:18,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165770869] [2021-02-19 17:47:18,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:18,891 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:19,938 INFO L93 Difference]: Finished difference Result 663 states and 1988 transitions. [2021-02-19 17:47:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:47:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:19,940 INFO L225 Difference]: With dead ends: 663 [2021-02-19 17:47:19,940 INFO L226 Difference]: Without dead ends: 633 [2021-02-19 17:47:19,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:47:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-02-19 17:47:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 316. [2021-02-19 17:47:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-02-19 17:47:19,945 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 20 [2021-02-19 17:47:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:19,945 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-02-19 17:47:19,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-02-19 17:47:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:19,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:19,945 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:20,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-02-19 17:47:20,160 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2129682851, now seen corresponding path program 77 times [2021-02-19 17:47:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:20,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152125845] [2021-02-19 17:47:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152125845] [2021-02-19 17:47:20,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126995844] [2021-02-19 17:47:20,258 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:20,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:20,357 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 26 treesize of output 20 [2021-02-19 17:47:20,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:20,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:20,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:20,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:43 [2021-02-19 17:47:20,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:20,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:20,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,433 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 30 treesize of output 24 [2021-02-19 17:47:20,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:20,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:20,472 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:47:20,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:20,473 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:85 [2021-02-19 17:47:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:20,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 17:47:20,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108821215] [2021-02-19 17:47:20,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:47:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:47:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:20,653 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:21,786 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 17:47:22,078 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 17:47:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:22,116 INFO L93 Difference]: Finished difference Result 855 states and 2542 transitions. [2021-02-19 17:47:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:47:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 20 [2021-02-19 17:47:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:22,118 INFO L225 Difference]: With dead ends: 855 [2021-02-19 17:47:22,118 INFO L226 Difference]: Without dead ends: 825 [2021-02-19 17:47:22,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:47:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-02-19 17:47:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 325. [2021-02-19 17:47:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:47:22,123 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:47:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:22,124 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:47:22,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2021-02-19 17:47:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:47:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:22,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:22,124 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:22,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:22,325 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash -581016503, now seen corresponding path program 78 times [2021-02-19 17:47:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:22,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652804967] [2021-02-19 17:47:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652804967] [2021-02-19 17:47:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259335571] [2021-02-19 17:47:22,424 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:22,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:22,477 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 19 treesize of output 15 [2021-02-19 17:47:22,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:22,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:22,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:22,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:22,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:22,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:47:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:22,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:22,639 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 30 treesize of output 24 [2021-02-19 17:47:22,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:22,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:22,650 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:22,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:22,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:22,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:22,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127840448] [2021-02-19 17:47:22,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:22,703 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:23,438 INFO L93 Difference]: Finished difference Result 658 states and 1957 transitions. [2021-02-19 17:47:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:47:23,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:23,439 INFO L225 Difference]: With dead ends: 658 [2021-02-19 17:47:23,439 INFO L226 Difference]: Without dead ends: 628 [2021-02-19 17:47:23,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:47:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-02-19 17:47:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 329. [2021-02-19 17:47:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:47:23,444 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:47:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:23,444 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:47:23,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:47:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:23,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:23,445 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:23,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:23,645 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 740421745, now seen corresponding path program 79 times [2021-02-19 17:47:23,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297549116] [2021-02-19 17:47:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297549116] [2021-02-19 17:47:23,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719612160] [2021-02-19 17:47:23,733 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:23,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:23,786 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 19 treesize of output 15 [2021-02-19 17:47:23,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,789 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 19 treesize of output 15 [2021-02-19 17:47:23,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:23,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:23,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:47:23,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:23,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,874 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 30 treesize of output 24 [2021-02-19 17:47:23,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:23,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:23,886 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:23,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:23,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:23,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:23,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:47:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779864182] [2021-02-19 17:47:23,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:23,940 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:24,203 INFO L93 Difference]: Finished difference Result 469 states and 1388 transitions. [2021-02-19 17:47:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:47:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:24,204 INFO L225 Difference]: With dead ends: 469 [2021-02-19 17:47:24,204 INFO L226 Difference]: Without dead ends: 454 [2021-02-19 17:47:24,205 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-02-19 17:47:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-02-19 17:47:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.988059701492537) internal successors, (1001), 335 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1001 transitions. [2021-02-19 17:47:24,208 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1001 transitions. Word has length 20 [2021-02-19 17:47:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:24,209 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1001 transitions. [2021-02-19 17:47:24,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1001 transitions. [2021-02-19 17:47:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:24,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:24,209 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:24,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable976,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:24,410 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 475003923, now seen corresponding path program 80 times [2021-02-19 17:47:24,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:24,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943909411] [2021-02-19 17:47:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943909411] [2021-02-19 17:47:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488328120] [2021-02-19 17:47:24,535 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:24,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:24,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:24,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:24,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,591 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 19 treesize of output 15 [2021-02-19 17:47:24,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:24,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:24,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:47:24,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:24,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:24,671 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:24,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:24,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:24,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_149 vanished before elimination [2021-02-19 17:47:24,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:24,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:47:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:24,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:24,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:47:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032054713] [2021-02-19 17:47:24,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:24,774 INFO L87 Difference]: Start difference. First operand 336 states and 1001 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:25,003 INFO L93 Difference]: Finished difference Result 490 states and 1457 transitions. [2021-02-19 17:47:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:47:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:25,004 INFO L225 Difference]: With dead ends: 490 [2021-02-19 17:47:25,004 INFO L226 Difference]: Without dead ends: 475 [2021-02-19 17:47:25,004 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-19 17:47:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 333. [2021-02-19 17:47:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-02-19 17:47:25,009 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-02-19 17:47:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:25,009 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-02-19 17:47:25,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-02-19 17:47:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:25,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:25,009 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:25,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-02-19 17:47:25,210 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1673792613, now seen corresponding path program 81 times [2021-02-19 17:47:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:25,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080067880] [2021-02-19 17:47:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080067880] [2021-02-19 17:47:25,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394594407] [2021-02-19 17:47:25,304 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:25,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:25,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:47:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:25,359 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 19 treesize of output 15 [2021-02-19 17:47:25,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:25,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:47:25,384 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 20 treesize of output 16 [2021-02-19 17:47:25,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:25,390 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:25,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:12 [2021-02-19 17:47:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:25,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:47:25,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811828551] [2021-02-19 17:47:25,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:25,434 INFO L87 Difference]: Start difference. First operand 333 states and 990 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:25,660 INFO L93 Difference]: Finished difference Result 466 states and 1374 transitions. [2021-02-19 17:47:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:47:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:25,661 INFO L225 Difference]: With dead ends: 466 [2021-02-19 17:47:25,661 INFO L226 Difference]: Without dead ends: 451 [2021-02-19 17:47:25,661 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-02-19 17:47:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 330. [2021-02-19 17:47:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-02-19 17:47:25,665 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-02-19 17:47:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:25,665 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-02-19 17:47:25,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-02-19 17:47:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:25,666 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:25,666 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:25,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable989,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:25,866 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1686033597, now seen corresponding path program 82 times [2021-02-19 17:47:25,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:25,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257717839] [2021-02-19 17:47:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257717839] [2021-02-19 17:47:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876730225] [2021-02-19 17:47:25,988 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:26,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:26,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:26,053 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 19 treesize of output 15 [2021-02-19 17:47:26,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:26,056 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 19 treesize of output 15 [2021-02-19 17:47:26,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:26,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:26,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:26,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:26,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:26,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:26,188 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 30 treesize of output 24 [2021-02-19 17:47:26,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:26,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:26,200 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:26,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:26,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:47:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:26,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675760494] [2021-02-19 17:47:26,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:26,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:26,260 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:26,591 INFO L93 Difference]: Finished difference Result 507 states and 1492 transitions. [2021-02-19 17:47:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:26,592 INFO L225 Difference]: With dead ends: 507 [2021-02-19 17:47:26,592 INFO L226 Difference]: Without dead ends: 492 [2021-02-19 17:47:26,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-02-19 17:47:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 336. [2021-02-19 17:47:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2021-02-19 17:47:26,597 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 20 [2021-02-19 17:47:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:26,597 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2021-02-19 17:47:26,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2021-02-19 17:47:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:26,597 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:26,597 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:26,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:26,798 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1499784077, now seen corresponding path program 83 times [2021-02-19 17:47:26,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:26,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827075036] [2021-02-19 17:47:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827075036] [2021-02-19 17:47:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985939073] [2021-02-19 17:47:26,919 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:26,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:26,979 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 19 treesize of output 15 [2021-02-19 17:47:26,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:26,982 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 19 treesize of output 15 [2021-02-19 17:47:26,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:27,071 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 30 treesize of output 24 [2021-02-19 17:47:27,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:27,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,088 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:27,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:47:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:27,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:27,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783005546] [2021-02-19 17:47:27,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:27,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:27,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:27,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:27,180 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:27,529 INFO L93 Difference]: Finished difference Result 501 states and 1479 transitions. [2021-02-19 17:47:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:27,530 INFO L225 Difference]: With dead ends: 501 [2021-02-19 17:47:27,530 INFO L226 Difference]: Without dead ends: 486 [2021-02-19 17:47:27,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-19 17:47:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 334. [2021-02-19 17:47:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.009009009009009) internal successors, (1002), 333 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1002 transitions. [2021-02-19 17:47:27,534 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1002 transitions. Word has length 20 [2021-02-19 17:47:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:27,535 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1002 transitions. [2021-02-19 17:47:27,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1002 transitions. [2021-02-19 17:47:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:27,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:27,535 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:27,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:27,736 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash -673199107, now seen corresponding path program 84 times [2021-02-19 17:47:27,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:27,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057794247] [2021-02-19 17:47:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057794247] [2021-02-19 17:47:27,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968657851] [2021-02-19 17:47:27,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:27,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:27,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:27,945 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 19 treesize of output 15 [2021-02-19 17:47:27,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,949 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 19 treesize of output 15 [2021-02-19 17:47:27,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:28,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:28,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:28,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:28,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:28,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:28,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:28,108 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:28,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-02-19 17:47:28,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:28,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:47:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:28,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:28,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916832126] [2021-02-19 17:47:28,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:28,193 INFO L87 Difference]: Start difference. First operand 334 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:28,576 INFO L93 Difference]: Finished difference Result 522 states and 1544 transitions. [2021-02-19 17:47:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:28,578 INFO L225 Difference]: With dead ends: 522 [2021-02-19 17:47:28,578 INFO L226 Difference]: Without dead ends: 507 [2021-02-19 17:47:28,578 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-02-19 17:47:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 331. [2021-02-19 17:47:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.003030303030303) internal successors, (991), 330 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 991 transitions. [2021-02-19 17:47:28,582 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 991 transitions. Word has length 20 [2021-02-19 17:47:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:28,582 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 991 transitions. [2021-02-19 17:47:28,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 991 transitions. [2021-02-19 17:47:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:28,583 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:28,583 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:28,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-02-19 17:47:28,783 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1527327343, now seen corresponding path program 85 times [2021-02-19 17:47:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:28,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089908339] [2021-02-19 17:47:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:28,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089908339] [2021-02-19 17:47:28,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183786539] [2021-02-19 17:47:28,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:47:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:28,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:28,982 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 19 treesize of output 15 [2021-02-19 17:47:28,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:28,986 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 19 treesize of output 15 [2021-02-19 17:47:28,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:29,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:47:29,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:29,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,091 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:29,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-02-19 17:47:29,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:29,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:47:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:29,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:29,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362378115] [2021-02-19 17:47:29,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:29,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:29,255 INFO L87 Difference]: Start difference. First operand 331 states and 991 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:29,504 INFO L93 Difference]: Finished difference Result 454 states and 1328 transitions. [2021-02-19 17:47:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:29,506 INFO L225 Difference]: With dead ends: 454 [2021-02-19 17:47:29,506 INFO L226 Difference]: Without dead ends: 439 [2021-02-19 17:47:29,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-02-19 17:47:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 330. [2021-02-19 17:47:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-02-19 17:47:29,510 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-02-19 17:47:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:29,510 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-02-19 17:47:29,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-02-19 17:47:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:29,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:29,510 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:29,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:29,711 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 162615561, now seen corresponding path program 86 times [2021-02-19 17:47:29,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:29,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769187528] [2021-02-19 17:47:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769187528] [2021-02-19 17:47:29,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476376858] [2021-02-19 17:47:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:29,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:47:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:29,889 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 19 treesize of output 15 [2021-02-19 17:47:29,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:47:29,916 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 20 treesize of output 16 [2021-02-19 17:47:29,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:29,923 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:47:29,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:29,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-02-19 17:47:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:29,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:47:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884876706] [2021-02-19 17:47:29,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:47:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:29,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:47:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:47:29,994 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:30,206 INFO L93 Difference]: Finished difference Result 482 states and 1416 transitions. [2021-02-19 17:47:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:47:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:30,207 INFO L225 Difference]: With dead ends: 482 [2021-02-19 17:47:30,207 INFO L226 Difference]: Without dead ends: 467 [2021-02-19 17:47:30,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-02-19 17:47:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 325. [2021-02-19 17:47:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:47:30,211 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:47:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:30,211 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:47:30,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:47:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:30,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:30,212 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:30,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-02-19 17:47:30,413 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1001716849, now seen corresponding path program 87 times [2021-02-19 17:47:30,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:30,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492157247] [2021-02-19 17:47:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:30,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492157247] [2021-02-19 17:47:30,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931547431] [2021-02-19 17:47:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:30,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:30,870 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 19 treesize of output 15 [2021-02-19 17:47:30,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:30,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:30,874 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 26 treesize of output 20 [2021-02-19 17:47:30,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:30,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:30,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:30,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:71 [2021-02-19 17:47:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:31,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:31,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:31,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:31,134 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 30 treesize of output 24 [2021-02-19 17:47:31,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:31,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:31,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:31,160 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:31,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:31,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:31,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:31,188 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 23 treesize of output 11 [2021-02-19 17:47:31,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:31,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:31,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:31,211 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-02-19 17:47:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:31,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:31,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:31,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240763557] [2021-02-19 17:47:31,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:31,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:31,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:31,278 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:31,644 INFO L93 Difference]: Finished difference Result 522 states and 1541 transitions. [2021-02-19 17:47:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:31,646 INFO L225 Difference]: With dead ends: 522 [2021-02-19 17:47:31,646 INFO L226 Difference]: Without dead ends: 507 [2021-02-19 17:47:31,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-02-19 17:47:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 331. [2021-02-19 17:47:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-02-19 17:47:31,650 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-02-19 17:47:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:31,650 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-02-19 17:47:31,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-02-19 17:47:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:31,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:31,651 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:31,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-02-19 17:47:31,862 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2110866471, now seen corresponding path program 88 times [2021-02-19 17:47:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337117124] [2021-02-19 17:47:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337117124] [2021-02-19 17:47:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335487986] [2021-02-19 17:47:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:32,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:32,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,311 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 26 treesize of output 20 [2021-02-19 17:47:32,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,315 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 19 treesize of output 15 [2021-02-19 17:47:32,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:32,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:32,349 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:71 [2021-02-19 17:47:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,435 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 30 treesize of output 24 [2021-02-19 17:47:32,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,469 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 23 treesize of output 11 [2021-02-19 17:47:32,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:32,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:32,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:32,529 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 12 treesize of output 5 [2021-02-19 17:47:32,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:32,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:32,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:32,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:33 [2021-02-19 17:47:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639534800] [2021-02-19 17:47:32,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:32,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:32,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:32,661 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:33,206 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-02-19 17:47:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:33,208 INFO L225 Difference]: With dead ends: 528 [2021-02-19 17:47:33,208 INFO L226 Difference]: Without dead ends: 513 [2021-02-19 17:47:33,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-02-19 17:47:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-02-19 17:47:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:47:33,212 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:47:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:33,212 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:47:33,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:47:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:33,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:33,213 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:33,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:33,414 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1604520205, now seen corresponding path program 89 times [2021-02-19 17:47:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:33,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086470130] [2021-02-19 17:47:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086470130] [2021-02-19 17:47:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221217521] [2021-02-19 17:47:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:33,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:33,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,777 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 19 treesize of output 15 [2021-02-19 17:47:33,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:33,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,808 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 26 treesize of output 20 [2021-02-19 17:47:33,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:33,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:33,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:71 [2021-02-19 17:47:33,904 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:47:33,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:33,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,916 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 30 treesize of output 24 [2021-02-19 17:47:33,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:33,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:33,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:34,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,019 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 23 treesize of output 11 [2021-02-19 17:47:34,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,024 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 12 treesize of output 5 [2021-02-19 17:47:34,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,030 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 23 treesize of output 11 [2021-02-19 17:47:34,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:34,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:34,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:34,114 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:217, output treesize:85 [2021-02-19 17:47:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:34,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:34,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:34,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480336125] [2021-02-19 17:47:34,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:34,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:34,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:34,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:34,304 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:34,860 INFO L93 Difference]: Finished difference Result 519 states and 1532 transitions. [2021-02-19 17:47:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:47:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:34,861 INFO L225 Difference]: With dead ends: 519 [2021-02-19 17:47:34,861 INFO L226 Difference]: Without dead ends: 504 [2021-02-19 17:47:34,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:47:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-02-19 17:47:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 327. [2021-02-19 17:47:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:47:34,866 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:47:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:34,866 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:47:34,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:47:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:34,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:34,867 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:35,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:35,067 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -67802157, now seen corresponding path program 90 times [2021-02-19 17:47:35,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:35,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455185743] [2021-02-19 17:47:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:35,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455185743] [2021-02-19 17:47:35,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084664835] [2021-02-19 17:47:35,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:35,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,357 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 19 treesize of output 15 [2021-02-19 17:47:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,361 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 19 treesize of output 15 [2021-02-19 17:47:35,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:35,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:35,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:47:36,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:36,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,049 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 30 treesize of output 24 [2021-02-19 17:47:36,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,079 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 12 treesize of output 5 [2021-02-19 17:47:36,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,106 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 23 treesize of output 11 [2021-02-19 17:47:36,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:36,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:89, output treesize:27 [2021-02-19 17:47:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:36,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:36,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:36,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998411630] [2021-02-19 17:47:36,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:36,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:36,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:36,200 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:36,740 INFO L93 Difference]: Finished difference Result 545 states and 1603 transitions. [2021-02-19 17:47:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:36,741 INFO L225 Difference]: With dead ends: 545 [2021-02-19 17:47:36,741 INFO L226 Difference]: Without dead ends: 530 [2021-02-19 17:47:36,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-02-19 17:47:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 333. [2021-02-19 17:47:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-02-19 17:47:36,745 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-02-19 17:47:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:36,745 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-02-19 17:47:36,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-02-19 17:47:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:36,746 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:36,746 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:36,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-02-19 17:47:36,946 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1041347465, now seen corresponding path program 91 times [2021-02-19 17:47:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:36,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731806190] [2021-02-19 17:47:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731806190] [2021-02-19 17:47:37,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210202407] [2021-02-19 17:47:37,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,250 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 19 treesize of output 15 [2021-02-19 17:47:37,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,255 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 19 treesize of output 15 [2021-02-19 17:47:37,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:37,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:47:37,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,635 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 30 treesize of output 24 [2021-02-19 17:47:37,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,672 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 23 treesize of output 11 [2021-02-19 17:47:37,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:37,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:37,741 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 12 treesize of output 5 [2021-02-19 17:47:37,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:37,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:37,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:99, output treesize:33 [2021-02-19 17:47:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:37,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:37,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273833454] [2021-02-19 17:47:37,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:37,874 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:38,345 INFO L93 Difference]: Finished difference Result 551 states and 1616 transitions. [2021-02-19 17:47:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:38,346 INFO L225 Difference]: With dead ends: 551 [2021-02-19 17:47:38,346 INFO L226 Difference]: Without dead ends: 536 [2021-02-19 17:47:38,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-02-19 17:47:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 331. [2021-02-19 17:47:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-02-19 17:47:38,351 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-02-19 17:47:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:38,351 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-02-19 17:47:38,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-02-19 17:47:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:38,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:38,351 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:38,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-02-19 17:47:38,554 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1867932435, now seen corresponding path program 92 times [2021-02-19 17:47:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:38,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093565160] [2021-02-19 17:47:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:38,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093565160] [2021-02-19 17:47:38,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725989287] [2021-02-19 17:47:38,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:38,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:38,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:38,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:38,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,854 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 19 treesize of output 15 [2021-02-19 17:47:38,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,859 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 19 treesize of output 15 [2021-02-19 17:47:38,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:38,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:38,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:47:39,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:39,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,208 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 12 treesize of output 5 [2021-02-19 17:47:39,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:39,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:39,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:39,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:97, output treesize:38 [2021-02-19 17:47:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:39,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:39,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13545614] [2021-02-19 17:47:39,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:39,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:39,422 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:39,961 INFO L93 Difference]: Finished difference Result 546 states and 1618 transitions. [2021-02-19 17:47:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:39,962 INFO L225 Difference]: With dead ends: 546 [2021-02-19 17:47:39,962 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 17:47:39,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 17:47:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 328. [2021-02-19 17:47:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-02-19 17:47:39,966 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-02-19 17:47:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:39,966 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-02-19 17:47:39,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-02-19 17:47:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:39,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:39,967 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:40,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:40,167 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1013804199, now seen corresponding path program 93 times [2021-02-19 17:47:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776769915] [2021-02-19 17:47:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776769915] [2021-02-19 17:47:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714318917] [2021-02-19 17:47:40,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:40,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,428 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 19 treesize of output 15 [2021-02-19 17:47:40,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,433 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 19 treesize of output 15 [2021-02-19 17:47:40,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:40,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:47:40,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:40,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,621 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 12 treesize of output 5 [2021-02-19 17:47:40,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:40,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,707 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 12 treesize of output 5 [2021-02-19 17:47:40,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:40,742 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:107, output treesize:47 [2021-02-19 17:47:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:40,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:40,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:40,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812556455] [2021-02-19 17:47:40,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:40,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:40,870 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:41,296 INFO L93 Difference]: Finished difference Result 420 states and 1228 transitions. [2021-02-19 17:47:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:41,298 INFO L225 Difference]: With dead ends: 420 [2021-02-19 17:47:41,298 INFO L226 Difference]: Without dead ends: 405 [2021-02-19 17:47:41,298 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-02-19 17:47:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 327. [2021-02-19 17:47:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:47:41,301 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:47:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:41,301 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:47:41,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:47:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:41,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:41,302 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:41,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1209 [2021-02-19 17:47:41,502 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 750678959, now seen corresponding path program 94 times [2021-02-19 17:47:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77485153] [2021-02-19 17:47:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:41,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77485153] [2021-02-19 17:47:41,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193926758] [2021-02-19 17:47:41,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:41,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:41,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,787 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 19 treesize of output 15 [2021-02-19 17:47:41,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,820 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 19 treesize of output 15 [2021-02-19 17:47:41,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:41,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:41,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-02-19 17:47:42,076 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:47:42,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,081 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 30 treesize of output 24 [2021-02-19 17:47:42,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:42,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,118 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 23 treesize of output 11 [2021-02-19 17:47:42,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,122 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 12 treesize of output 5 [2021-02-19 17:47:42,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:42,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:33 [2021-02-19 17:47:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26610280] [2021-02-19 17:47:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:42,261 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:42,853 INFO L93 Difference]: Finished difference Result 539 states and 1585 transitions. [2021-02-19 17:47:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:47:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:42,855 INFO L225 Difference]: With dead ends: 539 [2021-02-19 17:47:42,855 INFO L226 Difference]: Without dead ends: 524 [2021-02-19 17:47:42,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-02-19 17:47:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 330. [2021-02-19 17:47:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-02-19 17:47:42,859 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-02-19 17:47:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:42,859 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-02-19 17:47:42,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-02-19 17:47:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:42,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:42,860 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:43,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:43,060 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash -253652979, now seen corresponding path program 95 times [2021-02-19 17:47:43,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:43,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638959105] [2021-02-19 17:47:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:43,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638959105] [2021-02-19 17:47:43,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119415693] [2021-02-19 17:47:43,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:43,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:43,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:43,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,344 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 19 treesize of output 15 [2021-02-19 17:47:43,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:43,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,386 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 19 treesize of output 15 [2021-02-19 17:47:43,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:43,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:43,424 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:47:43,503 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:47:43,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:43,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:43,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:43,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,562 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 12 treesize of output 5 [2021-02-19 17:47:43,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:43,567 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 12 treesize of output 5 [2021-02-19 17:47:43,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:43,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:43,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:43,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:41 [2021-02-19 17:47:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:43,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:43,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:43,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639470109] [2021-02-19 17:47:43,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:43,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:43,754 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:44,270 INFO L93 Difference]: Finished difference Result 543 states and 1609 transitions. [2021-02-19 17:47:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:47:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:44,272 INFO L225 Difference]: With dead ends: 543 [2021-02-19 17:47:44,272 INFO L226 Difference]: Without dead ends: 528 [2021-02-19 17:47:44,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-02-19 17:47:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 326. [2021-02-19 17:47:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-02-19 17:47:44,276 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-02-19 17:47:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:44,276 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-02-19 17:47:44,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-02-19 17:47:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:44,276 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:44,276 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:44,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:44,477 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1417287169, now seen corresponding path program 96 times [2021-02-19 17:47:44,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:44,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719891413] [2021-02-19 17:47:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:44,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719891413] [2021-02-19 17:47:44,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490195657] [2021-02-19 17:47:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:44,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:44,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,753 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 19 treesize of output 15 [2021-02-19 17:47:44,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:44,759 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 19 treesize of output 15 [2021-02-19 17:47:44,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:44,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:44,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:44,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:83 [2021-02-19 17:47:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,258 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 30 treesize of output 24 [2021-02-19 17:47:45,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:45,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,317 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 12 treesize of output 5 [2021-02-19 17:47:45,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:45,343 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 23 treesize of output 11 [2021-02-19 17:47:45,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:45,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:45,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:45,371 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:27 [2021-02-19 17:47:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:45,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:45,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:45,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050293625] [2021-02-19 17:47:45,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:45,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:45,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:45,452 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:45,959 INFO L93 Difference]: Finished difference Result 449 states and 1329 transitions. [2021-02-19 17:47:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:45,961 INFO L225 Difference]: With dead ends: 449 [2021-02-19 17:47:45,961 INFO L226 Difference]: Without dead ends: 434 [2021-02-19 17:47:45,961 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-02-19 17:47:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 336. [2021-02-19 17:47:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-02-19 17:47:45,965 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-02-19 17:47:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:45,965 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-02-19 17:47:45,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-02-19 17:47:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:45,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:45,965 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:46,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-02-19 17:47:46,167 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1768530505, now seen corresponding path program 97 times [2021-02-19 17:47:46,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:46,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995827057] [2021-02-19 17:47:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:46,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995827057] [2021-02-19 17:47:46,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715763931] [2021-02-19 17:47:46,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,451 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 19 treesize of output 15 [2021-02-19 17:47:46,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,456 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 19 treesize of output 15 [2021-02-19 17:47:46,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:46,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:46,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:83 [2021-02-19 17:47:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,791 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 30 treesize of output 24 [2021-02-19 17:47:46,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,822 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 23 treesize of output 11 [2021-02-19 17:47:46,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:46,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:46,888 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 12 treesize of output 5 [2021-02-19 17:47:46,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:46,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:46,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:46,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:33 [2021-02-19 17:47:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:47,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:47,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:47,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763405729] [2021-02-19 17:47:47,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:47,032 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:47,441 INFO L93 Difference]: Finished difference Result 455 states and 1342 transitions. [2021-02-19 17:47:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:47,442 INFO L225 Difference]: With dead ends: 455 [2021-02-19 17:47:47,442 INFO L226 Difference]: Without dead ends: 440 [2021-02-19 17:47:47,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-02-19 17:47:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 334. [2021-02-19 17:47:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-02-19 17:47:47,446 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-02-19 17:47:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:47,446 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-02-19 17:47:47,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-02-19 17:47:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:47,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:47,447 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:47,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:47,660 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -941945535, now seen corresponding path program 98 times [2021-02-19 17:47:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567360232] [2021-02-19 17:47:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567360232] [2021-02-19 17:47:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345345758] [2021-02-19 17:47:47,824 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:47,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:47,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:47,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,904 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 19 treesize of output 15 [2021-02-19 17:47:47,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:47,908 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 19 treesize of output 15 [2021-02-19 17:47:47,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:47,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:47,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:47,948 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:83 [2021-02-19 17:47:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:48,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,364 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 12 treesize of output 5 [2021-02-19 17:47:48,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:48,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:48,449 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 12 treesize of output 5 [2021-02-19 17:47:48,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:48,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:48,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:48,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:91, output treesize:35 [2021-02-19 17:47:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367354472] [2021-02-19 17:47:48,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:48,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:48,598 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:49,034 INFO L93 Difference]: Finished difference Result 470 states and 1394 transitions. [2021-02-19 17:47:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:49,035 INFO L225 Difference]: With dead ends: 470 [2021-02-19 17:47:49,035 INFO L226 Difference]: Without dead ends: 455 [2021-02-19 17:47:49,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-02-19 17:47:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 331. [2021-02-19 17:47:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-02-19 17:47:49,039 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-02-19 17:47:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:49,039 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-02-19 17:47:49,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-02-19 17:47:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:49,040 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:49,040 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:49,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1320,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:49,240 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1796073771, now seen corresponding path program 99 times [2021-02-19 17:47:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:49,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750158676] [2021-02-19 17:47:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750158676] [2021-02-19 17:47:49,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393481611] [2021-02-19 17:47:49,410 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:49,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:47:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,509 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 19 treesize of output 15 [2021-02-19 17:47:49,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,514 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 19 treesize of output 15 [2021-02-19 17:47:49,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:49,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:83 [2021-02-19 17:47:49,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:49,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,725 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 12 treesize of output 5 [2021-02-19 17:47:49,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:49,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:49,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:49,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:49,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:49,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:49,858 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:101, output treesize:41 [2021-02-19 17:47:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:50,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:50,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:50,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375202438] [2021-02-19 17:47:50,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:50,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:50,009 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:50,438 INFO L93 Difference]: Finished difference Result 421 states and 1231 transitions. [2021-02-19 17:47:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:50,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:50,440 INFO L225 Difference]: With dead ends: 421 [2021-02-19 17:47:50,440 INFO L226 Difference]: Without dead ends: 406 [2021-02-19 17:47:50,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:47:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-02-19 17:47:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 330. [2021-02-19 17:47:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-02-19 17:47:50,443 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-02-19 17:47:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:50,443 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-02-19 17:47:50,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-02-19 17:47:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:50,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:50,444 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:50,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1366 [2021-02-19 17:47:50,644 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 98802359, now seen corresponding path program 100 times [2021-02-19 17:47:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:50,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087542742] [2021-02-19 17:47:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:50,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087542742] [2021-02-19 17:47:50,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824712553] [2021-02-19 17:47:50,783 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:50,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:50,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,921 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 19 treesize of output 15 [2021-02-19 17:47:50,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:50,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:50,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-02-19 17:47:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,971 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 20 treesize of output 16 [2021-02-19 17:47:50,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:50,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:50,976 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 20 treesize of output 16 [2021-02-19 17:47:50,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,018 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 12 treesize of output 5 [2021-02-19 17:47:51,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:51,022 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 12 treesize of output 5 [2021-02-19 17:47:51,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:51,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:51,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:51,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:35 [2021-02-19 17:47:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:51,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:51,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:51,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510092400] [2021-02-19 17:47:51,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:51,174 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:51,634 INFO L93 Difference]: Finished difference Result 459 states and 1366 transitions. [2021-02-19 17:47:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:51,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:51,636 INFO L225 Difference]: With dead ends: 459 [2021-02-19 17:47:51,636 INFO L226 Difference]: Without dead ends: 444 [2021-02-19 17:47:51,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-02-19 17:47:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 327. [2021-02-19 17:47:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:47:51,640 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:47:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:51,640 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:47:51,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:47:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:51,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:51,640 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:51,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:51,846 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -106130867, now seen corresponding path program 101 times [2021-02-19 17:47:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374117738] [2021-02-19 17:47:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374117738] [2021-02-19 17:47:52,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334641939] [2021-02-19 17:47:52,018 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:52,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:52,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:52,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,115 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 19 treesize of output 15 [2021-02-19 17:47:52,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:52,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:52,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:47:52,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,169 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 20 treesize of output 16 [2021-02-19 17:47:52,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,174 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 20 treesize of output 16 [2021-02-19 17:47:52,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:52,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,223 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 12 treesize of output 5 [2021-02-19 17:47:52,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,227 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 12 treesize of output 5 [2021-02-19 17:47:52,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:52,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:52,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:99, output treesize:41 [2021-02-19 17:47:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:52,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:52,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:52,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635788137] [2021-02-19 17:47:52,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:52,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:52,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:52,400 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:52,764 INFO L93 Difference]: Finished difference Result 485 states and 1434 transitions. [2021-02-19 17:47:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:52,765 INFO L225 Difference]: With dead ends: 485 [2021-02-19 17:47:52,765 INFO L226 Difference]: Without dead ends: 470 [2021-02-19 17:47:52,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-02-19 17:47:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 326. [2021-02-19 17:47:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-02-19 17:47:52,769 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-02-19 17:47:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:52,769 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-02-19 17:47:52,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-02-19 17:47:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:52,770 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:52,770 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:52,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1381,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:52,972 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1599301431, now seen corresponding path program 102 times [2021-02-19 17:47:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:52,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161272802] [2021-02-19 17:47:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:53,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161272802] [2021-02-19 17:47:53,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982250539] [2021-02-19 17:47:53,120 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 [2021-02-19 17:47:53,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,212 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 19 treesize of output 15 [2021-02-19 17:47:53,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,217 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 19 treesize of output 15 [2021-02-19 17:47:53,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:53,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:53,260 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:47:53,450 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:47:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:53,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,458 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 30 treesize of output 24 [2021-02-19 17:47:53,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,492 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 23 treesize of output 11 [2021-02-19 17:47:53,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,496 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 12 treesize of output 5 [2021-02-19 17:47:53,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:53,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:53,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:33 [2021-02-19 17:47:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:53,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:53,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635379691] [2021-02-19 17:47:53,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:53,627 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:54,041 INFO L93 Difference]: Finished difference Result 444 states and 1313 transitions. [2021-02-19 17:47:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:47:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:54,042 INFO L225 Difference]: With dead ends: 444 [2021-02-19 17:47:54,042 INFO L226 Difference]: Without dead ends: 429 [2021-02-19 17:47:54,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-02-19 17:47:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 332. [2021-02-19 17:47:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-02-19 17:47:54,046 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-02-19 17:47:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:54,046 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-02-19 17:47:54,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-02-19 17:47:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:54,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:54,047 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:54,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-02-19 17:47:54,247 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 594969493, now seen corresponding path program 103 times [2021-02-19 17:47:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050304991] [2021-02-19 17:47:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:54,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050304991] [2021-02-19 17:47:54,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122316209] [2021-02-19 17:47:54,401 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 [2021-02-19 17:47:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:54,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:54,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,488 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 19 treesize of output 15 [2021-02-19 17:47:54,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,493 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 19 treesize of output 15 [2021-02-19 17:47:54,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:54,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:47:54,625 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:47:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:54,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,635 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 21 treesize of output 17 [2021-02-19 17:47:54,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,685 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 12 treesize of output 5 [2021-02-19 17:47:54,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,690 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 12 treesize of output 5 [2021-02-19 17:47:54,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:54,733 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:47:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:54,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:54,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006194593] [2021-02-19 17:47:54,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:54,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:54,888 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:55,161 INFO L93 Difference]: Finished difference Result 466 states and 1382 transitions. [2021-02-19 17:47:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:55,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:55,163 INFO L225 Difference]: With dead ends: 466 [2021-02-19 17:47:55,163 INFO L226 Difference]: Without dead ends: 451 [2021-02-19 17:47:55,163 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-02-19 17:47:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 329. [2021-02-19 17:47:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:47:55,167 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:47:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:55,167 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:47:55,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:47:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:55,167 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:55,167 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:55,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-02-19 17:47:55,368 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash -742597721, now seen corresponding path program 104 times [2021-02-19 17:47:55,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:55,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387137828] [2021-02-19 17:47:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387137828] [2021-02-19 17:47:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171249287] [2021-02-19 17:47:55,526 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) [2021-02-19 17:47:55,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:55,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:47:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:55,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,620 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 19 treesize of output 15 [2021-02-19 17:47:55,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:55,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:47:55,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-02-19 17:47:55,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,672 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 20 treesize of output 16 [2021-02-19 17:47:55,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:55,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:55,689 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 12 treesize of output 5 [2021-02-19 17:47:55,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:55,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:47:55,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2021-02-19 17:47:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:55,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:55,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:47:55,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281938455] [2021-02-19 17:47:55,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:55,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:55,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:55,737 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:55,948 INFO L93 Difference]: Finished difference Result 393 states and 1158 transitions. [2021-02-19 17:47:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:47:55,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:47:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:55,949 INFO L225 Difference]: With dead ends: 393 [2021-02-19 17:47:55,949 INFO L226 Difference]: Without dead ends: 378 [2021-02-19 17:47:55,949 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-19 17:47:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 324. [2021-02-19 17:47:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-02-19 17:47:55,952 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-02-19 17:47:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:55,952 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-02-19 17:47:55,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-02-19 17:47:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:55,953 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:55,953 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:56,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-02-19 17:47:56,153 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1519307497, now seen corresponding path program 105 times [2021-02-19 17:47:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:56,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492578954] [2021-02-19 17:47:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:56,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492578954] [2021-02-19 17:47:56,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25974752] [2021-02-19 17:47:56,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:56,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:56,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,473 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 19 treesize of output 15 [2021-02-19 17:47:56,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,478 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 26 treesize of output 20 [2021-02-19 17:47:56,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:56,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:56,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:55 [2021-02-19 17:47:56,602 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-02-19 17:47:56,605 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 30 treesize of output 24 [2021-02-19 17:47:56,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:56,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:56,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,637 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:47:56,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:56,642 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 12 treesize of output 5 [2021-02-19 17:47:56,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:56,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:56,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:56,665 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:27 [2021-02-19 17:47:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:56,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:56,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:56,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496046855] [2021-02-19 17:47:56,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:56,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:56,738 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:57,268 INFO L93 Difference]: Finished difference Result 523 states and 1544 transitions. [2021-02-19 17:47:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:57,269 INFO L225 Difference]: With dead ends: 523 [2021-02-19 17:47:57,269 INFO L226 Difference]: Without dead ends: 508 [2021-02-19 17:47:57,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-02-19 17:47:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 330. [2021-02-19 17:47:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9848024316109423) internal successors, (982), 329 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 982 transitions. [2021-02-19 17:47:57,274 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 982 transitions. Word has length 20 [2021-02-19 17:47:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:57,274 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 982 transitions. [2021-02-19 17:47:57,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 982 transitions. [2021-02-19 17:47:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:57,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:57,274 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:57,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-02-19 17:47:57,475 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1666510177, now seen corresponding path program 106 times [2021-02-19 17:47:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:57,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113202159] [2021-02-19 17:47:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:57,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113202159] [2021-02-19 17:47:57,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83364601] [2021-02-19 17:47:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:57,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:47:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:57,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,804 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 19 treesize of output 15 [2021-02-19 17:47:57,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,808 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 26 treesize of output 20 [2021-02-19 17:47:57,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:57,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:55 [2021-02-19 17:47:57,885 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-02-19 17:47:57,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:57,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,893 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 30 treesize of output 24 [2021-02-19 17:47:57,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,926 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 12 treesize of output 5 [2021-02-19 17:47:57,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:57,930 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 23 treesize of output 11 [2021-02-19 17:47:57,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:57,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:57,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:47:57,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:33 [2021-02-19 17:47:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:58,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:58,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824543979] [2021-02-19 17:47:58,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:58,078 INFO L87 Difference]: Start difference. First operand 330 states and 982 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:58,545 INFO L93 Difference]: Finished difference Result 529 states and 1557 transitions. [2021-02-19 17:47:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:47:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:47:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:58,547 INFO L225 Difference]: With dead ends: 529 [2021-02-19 17:47:58,547 INFO L226 Difference]: Without dead ends: 514 [2021-02-19 17:47:58,547 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:47:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-02-19 17:47:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 328. [2021-02-19 17:47:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-02-19 17:47:58,551 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-02-19 17:47:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:58,551 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-02-19 17:47:58,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:47:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-02-19 17:47:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:47:58,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:58,552 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:58,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1423,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:58,752 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2122110853, now seen corresponding path program 107 times [2021-02-19 17:47:58,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:58,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897827807] [2021-02-19 17:47:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:58,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897827807] [2021-02-19 17:47:58,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82975261] [2021-02-19 17:47:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:58,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:59,090 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 19 treesize of output 15 [2021-02-19 17:47:59,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,095 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 26 treesize of output 20 [2021-02-19 17:47:59,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:47:59,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:65 [2021-02-19 17:47:59,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:59,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:59,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,299 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 30 treesize of output 24 [2021-02-19 17:47:59,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,305 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 30 treesize of output 24 [2021-02-19 17:47:59,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,388 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 23 treesize of output 11 [2021-02-19 17:47:59,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,394 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 23 treesize of output 11 [2021-02-19 17:47:59,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,473 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 12 treesize of output 5 [2021-02-19 17:47:59,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,478 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 12 treesize of output 5 [2021-02-19 17:47:59,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:59,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:59,547 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:185, output treesize:85 [2021-02-19 17:47:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:59,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:59,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:47:59,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259190900] [2021-02-19 17:47:59,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:59,743 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:00,412 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:48:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:00,480 INFO L93 Difference]: Finished difference Result 520 states and 1535 transitions. [2021-02-19 17:48:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:00,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:00,481 INFO L225 Difference]: With dead ends: 520 [2021-02-19 17:48:00,481 INFO L226 Difference]: Without dead ends: 505 [2021-02-19 17:48:00,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-02-19 17:48:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 326. [2021-02-19 17:48:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-02-19 17:48:00,486 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-02-19 17:48:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:00,486 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-02-19 17:48:00,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-02-19 17:48:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:00,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:00,486 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:00,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-02-19 17:48:00,694 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash 449788491, now seen corresponding path program 108 times [2021-02-19 17:48:00,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:00,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031794735] [2021-02-19 17:48:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:00,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031794735] [2021-02-19 17:48:00,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356800591] [2021-02-19 17:48:00,881 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:00,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:48:00,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:00,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:00,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:01,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,009 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 19 treesize of output 15 [2021-02-19 17:48:01,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,055 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 19 treesize of output 15 [2021-02-19 17:48:01,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:01,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:48:01,336 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:01,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,347 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 30 treesize of output 24 [2021-02-19 17:48:01,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,383 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 23 treesize of output 11 [2021-02-19 17:48:01,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,387 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 12 treesize of output 5 [2021-02-19 17:48:01,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:01,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:27 [2021-02-19 17:48:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:01,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:01,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799799420] [2021-02-19 17:48:01,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:01,497 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:02,147 INFO L93 Difference]: Finished difference Result 546 states and 1606 transitions. [2021-02-19 17:48:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:02,149 INFO L225 Difference]: With dead ends: 546 [2021-02-19 17:48:02,149 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 17:48:02,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 17:48:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 332. [2021-02-19 17:48:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0) internal successors, (993), 331 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 993 transitions. [2021-02-19 17:48:02,154 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 993 transitions. Word has length 20 [2021-02-19 17:48:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:02,154 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 993 transitions. [2021-02-19 17:48:02,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 993 transitions. [2021-02-19 17:48:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:02,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:02,155 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:02,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1451 [2021-02-19 17:48:02,355 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:02,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1558938113, now seen corresponding path program 109 times [2021-02-19 17:48:02,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:02,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13881722] [2021-02-19 17:48:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13881722] [2021-02-19 17:48:02,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160229430] [2021-02-19 17:48:02,545 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,675 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 19 treesize of output 15 [2021-02-19 17:48:02,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,714 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 19 treesize of output 15 [2021-02-19 17:48:02,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:02,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:02,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:48:02,930 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:02,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,942 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 30 treesize of output 24 [2021-02-19 17:48:02,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:02,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,984 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 23 treesize of output 11 [2021-02-19 17:48:02,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,990 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 12 treesize of output 5 [2021-02-19 17:48:02,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:03,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:03,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:48:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976130900] [2021-02-19 17:48:03,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:03,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:03,159 INFO L87 Difference]: Start difference. First operand 332 states and 993 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:03,907 INFO L93 Difference]: Finished difference Result 552 states and 1619 transitions. [2021-02-19 17:48:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:03,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:03,909 INFO L225 Difference]: With dead ends: 552 [2021-02-19 17:48:03,909 INFO L226 Difference]: Without dead ends: 537 [2021-02-19 17:48:03,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-02-19 17:48:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 330. [2021-02-19 17:48:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-02-19 17:48:03,913 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 20 [2021-02-19 17:48:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:03,913 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-02-19 17:48:03,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-02-19 17:48:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:03,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:03,914 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:04,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1469 [2021-02-19 17:48:04,114 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1909444213, now seen corresponding path program 110 times [2021-02-19 17:48:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:04,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469667314] [2021-02-19 17:48:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469667314] [2021-02-19 17:48:04,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931043616] [2021-02-19 17:48:04,291 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:04,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:04,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:04,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,390 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 19 treesize of output 15 [2021-02-19 17:48:04,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:04,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:04,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-02-19 17:48:04,549 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-02-19 17:48:04,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:04,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:04,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,592 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 12 treesize of output 5 [2021-02-19 17:48:04,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:04,597 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 12 treesize of output 5 [2021-02-19 17:48:04,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:04,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:04,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:04,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:35 [2021-02-19 17:48:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:04,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:04,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826210746] [2021-02-19 17:48:04,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:04,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:04,750 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:05,382 INFO L93 Difference]: Finished difference Result 547 states and 1621 transitions. [2021-02-19 17:48:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:05,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:05,383 INFO L225 Difference]: With dead ends: 547 [2021-02-19 17:48:05,383 INFO L226 Difference]: Without dead ends: 532 [2021-02-19 17:48:05,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-02-19 17:48:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 327. [2021-02-19 17:48:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9907975460122698) internal successors, (975), 326 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 975 transitions. [2021-02-19 17:48:05,387 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 975 transitions. Word has length 20 [2021-02-19 17:48:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:05,387 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 975 transitions. [2021-02-19 17:48:05,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 975 transitions. [2021-02-19 17:48:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:05,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:05,388 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:05,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1489,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:05,588 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1531394847, now seen corresponding path program 111 times [2021-02-19 17:48:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:05,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728329095] [2021-02-19 17:48:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:05,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728329095] [2021-02-19 17:48:05,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628481795] [2021-02-19 17:48:05,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:05,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:48:05,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:05,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:05,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,867 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 19 treesize of output 15 [2021-02-19 17:48:05,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:05,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:05,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:05,913 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 19 treesize of output 15 [2021-02-19 17:48:05,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:05,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:05,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:05,955 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:48:06,044 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:06,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:06,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:06,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:06,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,104 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 12 treesize of output 5 [2021-02-19 17:48:06,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:06,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:06,109 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 12 treesize of output 5 [2021-02-19 17:48:06,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:06,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:06,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:06,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:44 [2021-02-19 17:48:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:06,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:06,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599751274] [2021-02-19 17:48:06,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:06,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:06,313 INFO L87 Difference]: Start difference. First operand 327 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:06,679 INFO L93 Difference]: Finished difference Result 424 states and 1240 transitions. [2021-02-19 17:48:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:06,680 INFO L225 Difference]: With dead ends: 424 [2021-02-19 17:48:06,680 INFO L226 Difference]: Without dead ends: 409 [2021-02-19 17:48:06,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-02-19 17:48:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 326. [2021-02-19 17:48:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-02-19 17:48:06,688 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-02-19 17:48:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:06,688 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-02-19 17:48:06,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-02-19 17:48:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:06,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:06,688 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:06,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-02-19 17:48:06,889 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1268269607, now seen corresponding path program 112 times [2021-02-19 17:48:06,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:06,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837292685] [2021-02-19 17:48:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:07,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837292685] [2021-02-19 17:48:07,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870610805] [2021-02-19 17:48:07,106 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:07,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:07,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:07,228 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 19 treesize of output 15 [2021-02-19 17:48:07,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,233 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 19 treesize of output 15 [2021-02-19 17:48:07,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:07,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,503 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 30 treesize of output 24 [2021-02-19 17:48:07,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:48:07,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:07,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:07,594 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 12 treesize of output 5 [2021-02-19 17:48:07,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:07,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:07,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:07,615 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:48:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:07,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131565502] [2021-02-19 17:48:07,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:07,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:07,718 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:08,360 INFO L93 Difference]: Finished difference Result 540 states and 1588 transitions. [2021-02-19 17:48:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:48:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:08,362 INFO L225 Difference]: With dead ends: 540 [2021-02-19 17:48:08,362 INFO L226 Difference]: Without dead ends: 525 [2021-02-19 17:48:08,362 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-02-19 17:48:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 329. [2021-02-19 17:48:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9939024390243905) internal successors, (982), 328 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 982 transitions. [2021-02-19 17:48:08,370 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 982 transitions. Word has length 20 [2021-02-19 17:48:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:08,370 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 982 transitions. [2021-02-19 17:48:08,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 982 transitions. [2021-02-19 17:48:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:08,371 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:08,371 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:08,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:08,571 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash 263937669, now seen corresponding path program 113 times [2021-02-19 17:48:08,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:08,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718315314] [2021-02-19 17:48:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:08,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718315314] [2021-02-19 17:48:08,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327252522] [2021-02-19 17:48:08,787 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:08,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:08,903 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 19 treesize of output 15 [2021-02-19 17:48:08,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,909 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 19 treesize of output 15 [2021-02-19 17:48:08,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:08,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:09,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:09,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,086 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 12 treesize of output 5 [2021-02-19 17:48:09,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:09,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,169 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 12 treesize of output 5 [2021-02-19 17:48:09,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:09,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:09,217 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:91, output treesize:41 [2021-02-19 17:48:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:09,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:09,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105591034] [2021-02-19 17:48:09,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:09,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:09,371 INFO L87 Difference]: Start difference. First operand 329 states and 982 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:10,016 INFO L93 Difference]: Finished difference Result 544 states and 1612 transitions. [2021-02-19 17:48:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:48:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:10,017 INFO L225 Difference]: With dead ends: 544 [2021-02-19 17:48:10,017 INFO L226 Difference]: Without dead ends: 529 [2021-02-19 17:48:10,017 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-02-19 17:48:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 325. [2021-02-19 17:48:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:48:10,022 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:48:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:10,022 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:48:10,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:48:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:10,022 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:10,022 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:10,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:10,223 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1934877817, now seen corresponding path program 114 times [2021-02-19 17:48:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:10,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252246913] [2021-02-19 17:48:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:10,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252246913] [2021-02-19 17:48:10,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453320508] [2021-02-19 17:48:10,378 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:10,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:48:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:10,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,456 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 19 treesize of output 15 [2021-02-19 17:48:10,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,460 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 19 treesize of output 15 [2021-02-19 17:48:10,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:10,498 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:48:10,805 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:10,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:10,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,816 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 30 treesize of output 24 [2021-02-19 17:48:10,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,857 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 23 treesize of output 11 [2021-02-19 17:48:10,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,862 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 12 treesize of output 5 [2021-02-19 17:48:10,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:10,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:48:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:10,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:10,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:10,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586341789] [2021-02-19 17:48:10,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:10,978 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:11,283 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 17:48:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:11,400 INFO L93 Difference]: Finished difference Result 454 states and 1344 transitions. [2021-02-19 17:48:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:11,401 INFO L225 Difference]: With dead ends: 454 [2021-02-19 17:48:11,402 INFO L226 Difference]: Without dead ends: 439 [2021-02-19 17:48:11,402 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-02-19 17:48:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 335. [2021-02-19 17:48:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.997005988023952) internal successors, (1001), 334 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1001 transitions. [2021-02-19 17:48:11,406 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1001 transitions. Word has length 20 [2021-02-19 17:48:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:11,406 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1001 transitions. [2021-02-19 17:48:11,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1001 transitions. [2021-02-19 17:48:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:11,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:11,407 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:11,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1533,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:11,607 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1250939857, now seen corresponding path program 115 times [2021-02-19 17:48:11,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:11,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481503489] [2021-02-19 17:48:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481503489] [2021-02-19 17:48:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631171556] [2021-02-19 17:48:11,762 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,849 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 19 treesize of output 15 [2021-02-19 17:48:11,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:11,853 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 19 treesize of output 15 [2021-02-19 17:48:11,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:11,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:11,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:11,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:48:12,124 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:12,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,136 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 30 treesize of output 24 [2021-02-19 17:48:12,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:12,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,180 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 12 treesize of output 5 [2021-02-19 17:48:12,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:12,186 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 23 treesize of output 11 [2021-02-19 17:48:12,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:12,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:12,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:12,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:33 [2021-02-19 17:48:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:12,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:12,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:12,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556162038] [2021-02-19 17:48:12,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:12,357 INFO L87 Difference]: Start difference. First operand 335 states and 1001 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:12,706 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 17:48:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:12,858 INFO L93 Difference]: Finished difference Result 460 states and 1357 transitions. [2021-02-19 17:48:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:12,860 INFO L225 Difference]: With dead ends: 460 [2021-02-19 17:48:12,860 INFO L226 Difference]: Without dead ends: 445 [2021-02-19 17:48:12,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-02-19 17:48:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 333. [2021-02-19 17:48:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9939759036144578) internal successors, (994), 332 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 994 transitions. [2021-02-19 17:48:12,864 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 994 transitions. Word has length 20 [2021-02-19 17:48:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:12,864 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 994 transitions. [2021-02-19 17:48:12,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 994 transitions. [2021-02-19 17:48:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:12,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:12,864 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:13,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-02-19 17:48:13,078 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -424354887, now seen corresponding path program 116 times [2021-02-19 17:48:13,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:13,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537602388] [2021-02-19 17:48:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:13,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537602388] [2021-02-19 17:48:13,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935513786] [2021-02-19 17:48:13,255 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:48:13,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:13,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,358 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 19 treesize of output 15 [2021-02-19 17:48:13,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:13,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:13,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:48:13,591 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:13,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,597 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 21 treesize of output 17 [2021-02-19 17:48:13,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:13,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:13,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,653 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 12 treesize of output 5 [2021-02-19 17:48:13,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:13,658 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 12 treesize of output 5 [2021-02-19 17:48:13,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:13,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:13,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:13,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:35 [2021-02-19 17:48:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:13,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:13,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920996443] [2021-02-19 17:48:13,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:13,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:13,828 INFO L87 Difference]: Start difference. First operand 333 states and 994 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:14,179 INFO L93 Difference]: Finished difference Result 475 states and 1409 transitions. [2021-02-19 17:48:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:14,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:14,181 INFO L225 Difference]: With dead ends: 475 [2021-02-19 17:48:14,181 INFO L226 Difference]: Without dead ends: 460 [2021-02-19 17:48:14,181 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-02-19 17:48:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 330. [2021-02-19 17:48:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.987841945288754) internal successors, (983), 329 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 983 transitions. [2021-02-19 17:48:14,185 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 983 transitions. Word has length 20 [2021-02-19 17:48:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:14,185 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 983 transitions. [2021-02-19 17:48:14,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 983 transitions. [2021-02-19 17:48:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:14,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:14,185 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:14,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:14,398 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1278483123, now seen corresponding path program 117 times [2021-02-19 17:48:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:14,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106817933] [2021-02-19 17:48:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:14,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106817933] [2021-02-19 17:48:14,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651725625] [2021-02-19 17:48:14,540 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:14,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:14,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,633 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 19 treesize of output 15 [2021-02-19 17:48:14,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,638 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 19 treesize of output 15 [2021-02-19 17:48:14,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:14,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:14,684 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:48:14,778 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:14,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:14,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:14,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,842 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 12 treesize of output 5 [2021-02-19 17:48:14,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:14,847 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 12 treesize of output 5 [2021-02-19 17:48:14,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:14,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:14,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:14,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:48:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:15,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:15,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:15,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823672018] [2021-02-19 17:48:15,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:15,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:15,078 INFO L87 Difference]: Start difference. First operand 330 states and 983 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:15,458 INFO L93 Difference]: Finished difference Result 425 states and 1243 transitions. [2021-02-19 17:48:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:15,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:15,459 INFO L225 Difference]: With dead ends: 425 [2021-02-19 17:48:15,459 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 17:48:15,459 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 17:48:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 329. [2021-02-19 17:48:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:48:15,463 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:48:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:15,463 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:48:15,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:48:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:15,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:15,464 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:15,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:15,664 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 616393007, now seen corresponding path program 118 times [2021-02-19 17:48:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:15,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15598395] [2021-02-19 17:48:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15598395] [2021-02-19 17:48:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072945136] [2021-02-19 17:48:15,797 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:15,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:15,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:15,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:15,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-02-19 17:48:15,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,944 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 20 treesize of output 16 [2021-02-19 17:48:15,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:15,950 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 20 treesize of output 16 [2021-02-19 17:48:15,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:16,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:16,011 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 12 treesize of output 5 [2021-02-19 17:48:16,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:16,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:16,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:16,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:95, output treesize:35 [2021-02-19 17:48:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:16,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:16,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:16,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088772761] [2021-02-19 17:48:16,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:16,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:16,191 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:16,695 INFO L93 Difference]: Finished difference Result 464 states and 1381 transitions. [2021-02-19 17:48:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:16,697 INFO L225 Difference]: With dead ends: 464 [2021-02-19 17:48:16,697 INFO L226 Difference]: Without dead ends: 449 [2021-02-19 17:48:16,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-02-19 17:48:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 326. [2021-02-19 17:48:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-02-19 17:48:16,701 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-02-19 17:48:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:16,701 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-02-19 17:48:16,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-02-19 17:48:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:16,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:16,702 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:16,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-02-19 17:48:16,902 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash 411459781, now seen corresponding path program 119 times [2021-02-19 17:48:16,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:16,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278429848] [2021-02-19 17:48:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278429848] [2021-02-19 17:48:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606153938] [2021-02-19 17:48:17,056 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:17,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:17,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:17,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,149 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 19 treesize of output 15 [2021-02-19 17:48:17,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:17,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:17,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-02-19 17:48:17,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,210 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 20 treesize of output 16 [2021-02-19 17:48:17,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,215 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 20 treesize of output 16 [2021-02-19 17:48:17,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,282 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 12 treesize of output 5 [2021-02-19 17:48:17,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,287 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 12 treesize of output 5 [2021-02-19 17:48:17,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:17,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:17,343 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:41 [2021-02-19 17:48:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:17,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:17,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181015879] [2021-02-19 17:48:17,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:17,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:17,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:17,493 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:17,992 INFO L93 Difference]: Finished difference Result 490 states and 1449 transitions. [2021-02-19 17:48:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:17,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:17,993 INFO L225 Difference]: With dead ends: 490 [2021-02-19 17:48:17,993 INFO L226 Difference]: Without dead ends: 475 [2021-02-19 17:48:17,994 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-19 17:48:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 325. [2021-02-19 17:48:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:48:17,998 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:48:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:17,998 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:48:17,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:48:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:17,998 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:17,998 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:18,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1590,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:18,199 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2116892079, now seen corresponding path program 120 times [2021-02-19 17:48:18,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:18,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416379550] [2021-02-19 17:48:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:18,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416379550] [2021-02-19 17:48:18,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807732126] [2021-02-19 17:48:18,384 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:18,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:48:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:18,478 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 19 treesize of output 15 [2021-02-19 17:48:18,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:18,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:18,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,696 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 30 treesize of output 24 [2021-02-19 17:48:18,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:18,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,768 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 23 treesize of output 11 [2021-02-19 17:48:18,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,802 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 12 treesize of output 5 [2021-02-19 17:48:18,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:18,832 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:48:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:18,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:18,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:18,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241370248] [2021-02-19 17:48:18,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:18,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:18,969 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:19,542 INFO L93 Difference]: Finished difference Result 449 states and 1328 transitions. [2021-02-19 17:48:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:19,543 INFO L225 Difference]: With dead ends: 449 [2021-02-19 17:48:19,543 INFO L226 Difference]: Without dead ends: 434 [2021-02-19 17:48:19,544 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-02-19 17:48:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 331. [2021-02-19 17:48:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2021-02-19 17:48:19,548 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 20 [2021-02-19 17:48:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:19,548 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2021-02-19 17:48:19,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2021-02-19 17:48:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:19,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:19,548 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:19,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-02-19 17:48:19,749 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1112560141, now seen corresponding path program 121 times [2021-02-19 17:48:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:19,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096902474] [2021-02-19 17:48:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096902474] [2021-02-19 17:48:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763466832] [2021-02-19 17:48:19,911 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:19,987 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 19 treesize of output 15 [2021-02-19 17:48:19,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:19,990 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 19 treesize of output 15 [2021-02-19 17:48:19,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:20,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:20,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:20,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,183 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 12 treesize of output 5 [2021-02-19 17:48:20,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:20,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:20,271 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 12 treesize of output 5 [2021-02-19 17:48:20,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:20,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:20,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:20,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:91, output treesize:41 [2021-02-19 17:48:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:20,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216756534] [2021-02-19 17:48:20,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:20,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:20,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:20,498 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:20,985 INFO L93 Difference]: Finished difference Result 471 states and 1397 transitions. [2021-02-19 17:48:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:20,986 INFO L225 Difference]: With dead ends: 471 [2021-02-19 17:48:20,986 INFO L226 Difference]: Without dead ends: 456 [2021-02-19 17:48:20,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-02-19 17:48:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 328. [2021-02-19 17:48:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-02-19 17:48:20,990 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-02-19 17:48:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:20,990 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-02-19 17:48:20,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-02-19 17:48:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:20,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:20,991 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:21,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1614 [2021-02-19 17:48:21,191 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -225007073, now seen corresponding path program 122 times [2021-02-19 17:48:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:21,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804320477] [2021-02-19 17:48:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804320477] [2021-02-19 17:48:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042497157] [2021-02-19 17:48:21,317 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:21,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:48:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:21,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,408 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 19 treesize of output 15 [2021-02-19 17:48:21,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:21,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:48:21,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:48:21,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,473 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 20 treesize of output 16 [2021-02-19 17:48:21,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:21,494 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 12 treesize of output 5 [2021-02-19 17:48:21,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:21,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:21,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:15 [2021-02-19 17:48:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:21,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:21,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:48:21,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331038263] [2021-02-19 17:48:21,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:48:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:21,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:48:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:48:21,555 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:21,781 INFO L93 Difference]: Finished difference Result 397 states and 1170 transitions. [2021-02-19 17:48:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:48:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:48:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:21,782 INFO L225 Difference]: With dead ends: 397 [2021-02-19 17:48:21,783 INFO L226 Difference]: Without dead ends: 382 [2021-02-19 17:48:21,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:48:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-02-19 17:48:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 324. [2021-02-19 17:48:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.981424148606811) internal successors, (963), 323 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 963 transitions. [2021-02-19 17:48:21,786 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 963 transitions. Word has length 20 [2021-02-19 17:48:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:21,786 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 963 transitions. [2021-02-19 17:48:21,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 963 transitions. [2021-02-19 17:48:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:21,787 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:21,787 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:21,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1621,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:21,987 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1464757509, now seen corresponding path program 123 times [2021-02-19 17:48:21,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:21,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230500798] [2021-02-19 17:48:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230500798] [2021-02-19 17:48:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630898044] [2021-02-19 17:48:22,129 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:22,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:22,186 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 19 treesize of output 15 [2021-02-19 17:48:22,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:22,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:22,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:22,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:48:22,322 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 30 treesize of output 24 [2021-02-19 17:48:22,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:22,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:22,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:22,342 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:48:22,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:22,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:48:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:22,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:22,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:48:22,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397590097] [2021-02-19 17:48:22,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:22,448 INFO L87 Difference]: Start difference. First operand 324 states and 963 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,150 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 17:48:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:23,343 INFO L93 Difference]: Finished difference Result 629 states and 1873 transitions. [2021-02-19 17:48:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:48:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:23,346 INFO L225 Difference]: With dead ends: 629 [2021-02-19 17:48:23,346 INFO L226 Difference]: Without dead ends: 599 [2021-02-19 17:48:23,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-02-19 17:48:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 327. [2021-02-19 17:48:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-02-19 17:48:23,350 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-02-19 17:48:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:23,350 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-02-19 17:48:23,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-02-19 17:48:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:23,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:23,351 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:23,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-02-19 17:48:23,551 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -702457639, now seen corresponding path program 124 times [2021-02-19 17:48:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754891789] [2021-02-19 17:48:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:23,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754891789] [2021-02-19 17:48:23,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642961064] [2021-02-19 17:48:23,676 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:23,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:23,753 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 19 treesize of output 15 [2021-02-19 17:48:23,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:23,758 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 19 treesize of output 15 [2021-02-19 17:48:23,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:23,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:23,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:23,797 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:48:23,913 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 30 treesize of output 24 [2021-02-19 17:48:23,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:23,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:23,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:23,939 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:48:23,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:23,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:48:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:24,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:48:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388889041] [2021-02-19 17:48:24,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:24,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:24,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:24,087 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:24,556 INFO L93 Difference]: Finished difference Result 480 states and 1419 transitions. [2021-02-19 17:48:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:24,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:48:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:24,558 INFO L225 Difference]: With dead ends: 480 [2021-02-19 17:48:24,558 INFO L226 Difference]: Without dead ends: 465 [2021-02-19 17:48:24,558 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:48:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-02-19 17:48:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 333. [2021-02-19 17:48:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2021-02-19 17:48:24,562 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 20 [2021-02-19 17:48:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:24,562 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2021-02-19 17:48:24,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2021-02-19 17:48:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:24,563 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:24,563 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:24,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1633,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:24,778 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1706789577, now seen corresponding path program 125 times [2021-02-19 17:48:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:24,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083308638] [2021-02-19 17:48:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083308638] [2021-02-19 17:48:24,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584996042] [2021-02-19 17:48:24,900 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:24,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:24,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:24,961 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 19 treesize of output 15 [2021-02-19 17:48:24,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,964 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 19 treesize of output 15 [2021-02-19 17:48:24,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:24,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:24,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:24,995 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:48:25,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:25,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:25,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:25,158 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:48:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:25,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:25,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:25,242 INFO L518 ElimStorePlain]: Eliminatee v_prenex_276 vanished before elimination [2021-02-19 17:48:25,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:48:25,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:101 [2021-02-19 17:48:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:25,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:48:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057892257] [2021-02-19 17:48:25,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:25,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:25,610 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:26,077 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:48:26,413 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 17:48:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:26,458 INFO L93 Difference]: Finished difference Result 523 states and 1531 transitions. [2021-02-19 17:48:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:48:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:48:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:26,460 INFO L225 Difference]: With dead ends: 523 [2021-02-19 17:48:26,460 INFO L226 Difference]: Without dead ends: 493 [2021-02-19 17:48:26,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-02-19 17:48:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 330. [2021-02-19 17:48:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-02-19 17:48:26,464 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-02-19 17:48:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:26,464 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-02-19 17:48:26,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-02-19 17:48:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:26,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:26,465 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:26,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1645 [2021-02-19 17:48:26,666 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1250610505, now seen corresponding path program 126 times [2021-02-19 17:48:26,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:26,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513395094] [2021-02-19 17:48:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:26,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513395094] [2021-02-19 17:48:26,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232635361] [2021-02-19 17:48:26,834 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:26,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:48:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:26,908 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 19 treesize of output 15 [2021-02-19 17:48:26,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:26,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:48:26,949 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 20 treesize of output 16 [2021-02-19 17:48:26,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,954 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 20 treesize of output 16 [2021-02-19 17:48:26,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:26,981 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:48:26,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:26,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:48:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:27,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:27,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:48:27,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757014373] [2021-02-19 17:48:27,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:27,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:27,114 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:27,518 INFO L93 Difference]: Finished difference Result 494 states and 1469 transitions. [2021-02-19 17:48:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:48:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:48:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:27,520 INFO L225 Difference]: With dead ends: 494 [2021-02-19 17:48:27,520 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 17:48:27,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 17:48:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 327. [2021-02-19 17:48:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-02-19 17:48:27,525 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-02-19 17:48:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:27,525 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-02-19 17:48:27,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-02-19 17:48:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:27,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:27,525 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:27,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1655,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:27,726 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1118059445, now seen corresponding path program 127 times [2021-02-19 17:48:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:27,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484056470] [2021-02-19 17:48:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:27,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484056470] [2021-02-19 17:48:27,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249009470] [2021-02-19 17:48:27,894 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:27,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,062 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 26 treesize of output 20 [2021-02-19 17:48:28,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,067 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 19 treesize of output 15 [2021-02-19 17:48:28,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:28,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:48:28,196 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 30 treesize of output 24 [2021-02-19 17:48:28,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,217 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:48:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:28,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,238 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-02-19 17:48:28,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:28,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-02-19 17:48:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:28,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:28,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179886382] [2021-02-19 17:48:28,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:28,328 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:29,845 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 17:48:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:30,116 INFO L93 Difference]: Finished difference Result 627 states and 1845 transitions. [2021-02-19 17:48:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:48:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:30,118 INFO L225 Difference]: With dead ends: 627 [2021-02-19 17:48:30,118 INFO L226 Difference]: Without dead ends: 597 [2021-02-19 17:48:30,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:48:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-02-19 17:48:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 340. [2021-02-19 17:48:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-02-19 17:48:30,123 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 20 [2021-02-19 17:48:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:30,123 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-02-19 17:48:30,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-02-19 17:48:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:30,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:30,123 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:30,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-02-19 17:48:30,324 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2067758229, now seen corresponding path program 128 times [2021-02-19 17:48:30,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:30,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683123971] [2021-02-19 17:48:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:30,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683123971] [2021-02-19 17:48:30,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209753881] [2021-02-19 17:48:30,493 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:30,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:30,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:30,631 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 26 treesize of output 20 [2021-02-19 17:48:30,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,634 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 19 treesize of output 15 [2021-02-19 17:48:30,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:30,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:30,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:48:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:30,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:30,713 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 30 treesize of output 24 [2021-02-19 17:48:30,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:30,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:30,729 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:48:30,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_279 vanished before elimination [2021-02-19 17:48:30,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:30,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:48:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:30,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:30,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:30,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354785126] [2021-02-19 17:48:30,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:30,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:30,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:30,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:30,896 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:32,529 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 17:48:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:32,820 INFO L93 Difference]: Finished difference Result 622 states and 1820 transitions. [2021-02-19 17:48:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:48:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:32,822 INFO L225 Difference]: With dead ends: 622 [2021-02-19 17:48:32,822 INFO L226 Difference]: Without dead ends: 592 [2021-02-19 17:48:32,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:48:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-02-19 17:48:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 338. [2021-02-19 17:48:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.99406528189911) internal successors, (1009), 337 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1009 transitions. [2021-02-19 17:48:32,827 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1009 transitions. Word has length 20 [2021-02-19 17:48:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:32,827 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1009 transitions. [2021-02-19 17:48:32,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1009 transitions. [2021-02-19 17:48:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:32,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:32,827 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:33,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1672 [2021-02-19 17:48:33,045 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1720862801, now seen corresponding path program 129 times [2021-02-19 17:48:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:33,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560862825] [2021-02-19 17:48:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560862825] [2021-02-19 17:48:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621851934] [2021-02-19 17:48:33,242 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:33,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:48:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:33,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:33,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:33,428 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 26 treesize of output 20 [2021-02-19 17:48:33,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:33,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:33,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:33,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:49 [2021-02-19 17:48:33,516 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 30 treesize of output 24 [2021-02-19 17:48:33,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:33,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:33,544 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:48:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:33,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:33,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:33,570 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-02-19 17:48:33,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:33,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:33 [2021-02-19 17:48:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647801209] [2021-02-19 17:48:33,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:33,690 INFO L87 Difference]: Start difference. First operand 338 states and 1009 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:34,646 INFO L93 Difference]: Finished difference Result 594 states and 1747 transitions. [2021-02-19 17:48:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:34,648 INFO L225 Difference]: With dead ends: 594 [2021-02-19 17:48:34,648 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 17:48:34,648 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:48:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 17:48:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 339. [2021-02-19 17:48:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2021-02-19 17:48:34,652 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2021-02-19 17:48:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:34,652 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2021-02-19 17:48:34,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2021-02-19 17:48:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:34,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:34,653 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:34,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1683 [2021-02-19 17:48:34,862 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1533868697, now seen corresponding path program 130 times [2021-02-19 17:48:34,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:34,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789058085] [2021-02-19 17:48:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:35,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789058085] [2021-02-19 17:48:35,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645008401] [2021-02-19 17:48:35,025 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:35,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:35,147 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 26 treesize of output 20 [2021-02-19 17:48:35,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,151 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 19 treesize of output 15 [2021-02-19 17:48:35,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:35,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:35,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:43 [2021-02-19 17:48:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:48:35,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:35,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:35,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:35,293 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:48:35,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:35,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:48:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:35,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:35,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934340756] [2021-02-19 17:48:35,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:35,457 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:36,440 INFO L93 Difference]: Finished difference Result 665 states and 1979 transitions. [2021-02-19 17:48:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:48:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:36,443 INFO L225 Difference]: With dead ends: 665 [2021-02-19 17:48:36,443 INFO L226 Difference]: Without dead ends: 650 [2021-02-19 17:48:36,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-02-19 17:48:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 337. [2021-02-19 17:48:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0) internal successors, (1008), 336 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1008 transitions. [2021-02-19 17:48:36,448 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1008 transitions. Word has length 20 [2021-02-19 17:48:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:36,448 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1008 transitions. [2021-02-19 17:48:36,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1008 transitions. [2021-02-19 17:48:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:36,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:36,448 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:36,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1694,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:36,649 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash 163239605, now seen corresponding path program 131 times [2021-02-19 17:48:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:36,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049284812] [2021-02-19 17:48:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:36,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049284812] [2021-02-19 17:48:36,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657305827] [2021-02-19 17:48:36,903 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:36,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:36,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:36,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,072 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 19 treesize of output 15 [2021-02-19 17:48:37,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,079 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 19 treesize of output 15 [2021-02-19 17:48:37,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,087 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 19 treesize of output 15 [2021-02-19 17:48:37,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,094 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 19 treesize of output 15 [2021-02-19 17:48:37,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,213 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:48:37,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:37,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:48:37,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:145 [2021-02-19 17:48:37,362 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:48:37,516 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-02-19 17:48:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:37,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,528 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 30 treesize of output 24 [2021-02-19 17:48:37,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:37,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,540 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 30 treesize of output 24 [2021-02-19 17:48:37,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:37,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,647 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 24 treesize of output 9 [2021-02-19 17:48:37,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,656 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 12 treesize of output 5 [2021-02-19 17:48:37,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,663 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 24 treesize of output 9 [2021-02-19 17:48:37,665 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,670 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 12 treesize of output 5 [2021-02-19 17:48:37,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:37,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:48:37,759 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:193, output treesize:81 [2021-02-19 17:48:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:37,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:37,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:37,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944081366] [2021-02-19 17:48:37,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:37,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:37,993 INFO L87 Difference]: Start difference. First operand 337 states and 1008 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:38,835 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 17:48:39,130 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-02-19 17:48:39,341 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:48:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:39,426 INFO L93 Difference]: Finished difference Result 551 states and 1634 transitions. [2021-02-19 17:48:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:39,428 INFO L225 Difference]: With dead ends: 551 [2021-02-19 17:48:39,428 INFO L226 Difference]: Without dead ends: 536 [2021-02-19 17:48:39,429 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:48:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-02-19 17:48:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 338. [2021-02-19 17:48:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.00593471810089) internal successors, (1013), 337 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1013 transitions. [2021-02-19 17:48:39,433 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1013 transitions. Word has length 20 [2021-02-19 17:48:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:39,433 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1013 transitions. [2021-02-19 17:48:39,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1013 transitions. [2021-02-19 17:48:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:39,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:39,434 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:39,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1704,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:39,634 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash -690888631, now seen corresponding path program 132 times [2021-02-19 17:48:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:39,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552327188] [2021-02-19 17:48:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:39,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552327188] [2021-02-19 17:48:39,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705291364] [2021-02-19 17:48:39,801 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:39,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:48:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:40,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,045 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 19 treesize of output 15 [2021-02-19 17:48:40,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:40,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,111 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 19 treesize of output 15 [2021-02-19 17:48:40,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:40,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:40,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:48:40,289 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:40,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:40,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:40,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,367 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 12 treesize of output 5 [2021-02-19 17:48:40,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:40,373 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 12 treesize of output 5 [2021-02-19 17:48:40,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:40,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:40,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:41 [2021-02-19 17:48:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:40,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:40,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:40,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856689521] [2021-02-19 17:48:40,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:40,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:40,606 INFO L87 Difference]: Start difference. First operand 338 states and 1013 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:41,349 INFO L93 Difference]: Finished difference Result 466 states and 1371 transitions. [2021-02-19 17:48:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:41,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:41,351 INFO L225 Difference]: With dead ends: 466 [2021-02-19 17:48:41,351 INFO L226 Difference]: Without dead ends: 451 [2021-02-19 17:48:41,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-02-19 17:48:41,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 337. [2021-02-19 17:48:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0) internal successors, (1008), 336 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1008 transitions. [2021-02-19 17:48:41,355 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1008 transitions. Word has length 20 [2021-02-19 17:48:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:41,356 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1008 transitions. [2021-02-19 17:48:41,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1008 transitions. [2021-02-19 17:48:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:41,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:41,356 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:41,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-02-19 17:48:41,557 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -954013871, now seen corresponding path program 133 times [2021-02-19 17:48:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:41,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552133897] [2021-02-19 17:48:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:41,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552133897] [2021-02-19 17:48:41,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928906210] [2021-02-19 17:48:41,782 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:41,902 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 19 treesize of output 15 [2021-02-19 17:48:41,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,906 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 19 treesize of output 15 [2021-02-19 17:48:41,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:41,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:41,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:41,948 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:42,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:42,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,213 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 12 treesize of output 5 [2021-02-19 17:48:42,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,263 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 30 treesize of output 24 [2021-02-19 17:48:42,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:42,303 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 23 treesize of output 11 [2021-02-19 17:48:42,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:42,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:42,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:42,344 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:48:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:42,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:42,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9519525] [2021-02-19 17:48:42,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:42,529 INFO L87 Difference]: Start difference. First operand 337 states and 1008 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:43,409 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 17:48:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:43,727 INFO L93 Difference]: Finished difference Result 524 states and 1548 transitions. [2021-02-19 17:48:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:43,729 INFO L225 Difference]: With dead ends: 524 [2021-02-19 17:48:43,729 INFO L226 Difference]: Without dead ends: 509 [2021-02-19 17:48:43,729 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:48:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-02-19 17:48:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 340. [2021-02-19 17:48:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0088495575221237) internal successors, (1020), 339 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1020 transitions. [2021-02-19 17:48:43,733 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1020 transitions. Word has length 20 [2021-02-19 17:48:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:43,733 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1020 transitions. [2021-02-19 17:48:43,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1020 transitions. [2021-02-19 17:48:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:43,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:43,734 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:43,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-02-19 17:48:43,934 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1958345809, now seen corresponding path program 134 times [2021-02-19 17:48:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:43,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574618570] [2021-02-19 17:48:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574618570] [2021-02-19 17:48:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569971589] [2021-02-19 17:48:44,168 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:44,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:44,280 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 19 treesize of output 15 [2021-02-19 17:48:44,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,284 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 19 treesize of output 15 [2021-02-19 17:48:44,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:44,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:44,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:44,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:44,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,547 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 12 treesize of output 5 [2021-02-19 17:48:44,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:44,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:44,599 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 12 treesize of output 5 [2021-02-19 17:48:44,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:44,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:44,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:44,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:91, output treesize:41 [2021-02-19 17:48:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:44,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:44,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:44,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240268005] [2021-02-19 17:48:44,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:44,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:44,875 INFO L87 Difference]: Start difference. First operand 340 states and 1020 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:45,924 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:48:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:46,006 INFO L93 Difference]: Finished difference Result 574 states and 1707 transitions. [2021-02-19 17:48:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:48:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:46,008 INFO L225 Difference]: With dead ends: 574 [2021-02-19 17:48:46,008 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 17:48:46,008 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:48:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 17:48:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 336. [2021-02-19 17:48:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-02-19 17:48:46,013 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-02-19 17:48:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:46,013 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-02-19 17:48:46,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-02-19 17:48:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:46,013 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:46,013 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:46,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:46,214 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:46,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2061823749, now seen corresponding path program 135 times [2021-02-19 17:48:46,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:46,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883509127] [2021-02-19 17:48:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:46,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883509127] [2021-02-19 17:48:46,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097335098] [2021-02-19 17:48:46,417 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:46,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:48:46,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:46,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:46,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,528 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 19 treesize of output 15 [2021-02-19 17:48:46,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:46,535 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 19 treesize of output 15 [2021-02-19 17:48:46,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:46,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:46,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-02-19 17:48:46,907 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_296], 1=[o_2, v_prenex_297]} [2021-02-19 17:48:46,911 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 30 treesize of output 24 [2021-02-19 17:48:46,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:46,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:46,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:47,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,005 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 23 treesize of output 11 [2021-02-19 17:48:47,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:47,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,055 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 12 treesize of output 5 [2021-02-19 17:48:47,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:47,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:47,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:87, output treesize:33 [2021-02-19 17:48:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:47,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:47,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:47,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788917605] [2021-02-19 17:48:47,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:47,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:47,265 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:48,081 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 17:48:48,546 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-02-19 17:48:49,052 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-02-19 17:48:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:49,346 INFO L93 Difference]: Finished difference Result 764 states and 2241 transitions. [2021-02-19 17:48:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:48:49,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:49,348 INFO L225 Difference]: With dead ends: 764 [2021-02-19 17:48:49,348 INFO L226 Difference]: Without dead ends: 734 [2021-02-19 17:48:49,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:48:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-02-19 17:48:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 335. [2021-02-19 17:48:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9940119760479043) internal successors, (1000), 334 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1000 transitions. [2021-02-19 17:48:49,353 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1000 transitions. Word has length 20 [2021-02-19 17:48:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:49,354 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1000 transitions. [2021-02-19 17:48:49,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1000 transitions. [2021-02-19 17:48:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:49,354 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:49,354 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:49,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1753 [2021-02-19 17:48:49,555 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1038297347, now seen corresponding path program 136 times [2021-02-19 17:48:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806011037] [2021-02-19 17:48:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:49,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806011037] [2021-02-19 17:48:49,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240549702] [2021-02-19 17:48:49,843 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:49,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:50,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,086 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 26 treesize of output 20 [2021-02-19 17:48:50,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:50,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:50,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:65 [2021-02-19 17:48:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:50,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,300 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 12 treesize of output 5 [2021-02-19 17:48:50,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:48:50,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:48:50,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:50,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:50,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:50,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:48:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:50,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:50,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:50,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689090083] [2021-02-19 17:48:50,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:50,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:50,642 INFO L87 Difference]: Start difference. First operand 335 states and 1000 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:51,519 INFO L93 Difference]: Finished difference Result 525 states and 1555 transitions. [2021-02-19 17:48:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:51,521 INFO L225 Difference]: With dead ends: 525 [2021-02-19 17:48:51,521 INFO L226 Difference]: Without dead ends: 510 [2021-02-19 17:48:51,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-02-19 17:48:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 333. [2021-02-19 17:48:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.996987951807229) internal successors, (995), 332 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 995 transitions. [2021-02-19 17:48:51,525 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 995 transitions. Word has length 20 [2021-02-19 17:48:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 995 transitions. [2021-02-19 17:48:51,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 995 transitions. [2021-02-19 17:48:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:51,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:51,526 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:51,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:51,726 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash -774885117, now seen corresponding path program 137 times [2021-02-19 17:48:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:51,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952521888] [2021-02-19 17:48:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952521888] [2021-02-19 17:48:51,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554979691] [2021-02-19 17:48:51,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:51,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,080 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 19 treesize of output 15 [2021-02-19 17:48:52,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,086 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 19 treesize of output 15 [2021-02-19 17:48:52,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,257 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:48:52,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:52,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,264 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 19 treesize of output 15 [2021-02-19 17:48:52,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:52,271 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 19 treesize of output 15 [2021-02-19 17:48:52,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:52,426 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:48:52,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:52,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:48:52,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-02-19 17:48:53,069 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-02-19 17:48:53,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,090 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 30 treesize of output 24 [2021-02-19 17:48:53,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,101 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 30 treesize of output 24 [2021-02-19 17:48:53,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:53,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:53,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,245 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:48:53,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:53,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,253 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 24 treesize of output 9 [2021-02-19 17:48:53,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,262 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 12 treesize of output 5 [2021-02-19 17:48:53,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:53,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:53,279 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 24 treesize of output 9 [2021-02-19 17:48:53,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:53,404 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 17:48:53,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:53,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:48:53,408 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:225, output treesize:90 [2021-02-19 17:48:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:53,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:53,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66304967] [2021-02-19 17:48:53,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:53,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:53,651 INFO L87 Difference]: Start difference. First operand 333 states and 995 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:54,903 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-02-19 17:48:55,308 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:48:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:55,405 INFO L93 Difference]: Finished difference Result 545 states and 1610 transitions. [2021-02-19 17:48:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:48:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:55,407 INFO L225 Difference]: With dead ends: 545 [2021-02-19 17:48:55,407 INFO L226 Difference]: Without dead ends: 530 [2021-02-19 17:48:55,408 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:48:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-02-19 17:48:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 330. [2021-02-19 17:48:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2021-02-19 17:48:55,412 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 20 [2021-02-19 17:48:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:55,412 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2021-02-19 17:48:55,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2021-02-19 17:48:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:55,412 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:55,413 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:55,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-02-19 17:48:55,613 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1629013353, now seen corresponding path program 138 times [2021-02-19 17:48:55,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:55,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624512914] [2021-02-19 17:48:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:55,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624512914] [2021-02-19 17:48:55,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499307858] [2021-02-19 17:48:55,822 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:55,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:48:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:55,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:55,997 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 19 treesize of output 15 [2021-02-19 17:48:55,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,075 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 19 treesize of output 15 [2021-02-19 17:48:56,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:56,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:48:56,268 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:48:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:56,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:56,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,357 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 12 treesize of output 5 [2021-02-19 17:48:56,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:56,364 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 12 treesize of output 5 [2021-02-19 17:48:56,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:56,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:56,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:56,431 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:44 [2021-02-19 17:48:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:56,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:56,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:56,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834297882] [2021-02-19 17:48:56,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:56,682 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:57,640 INFO L93 Difference]: Finished difference Result 564 states and 1667 transitions. [2021-02-19 17:48:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:48:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:48:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:57,643 INFO L225 Difference]: With dead ends: 564 [2021-02-19 17:48:57,643 INFO L226 Difference]: Without dead ends: 549 [2021-02-19 17:48:57,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-02-19 17:48:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 329. [2021-02-19 17:48:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-02-19 17:48:57,647 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-02-19 17:48:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:57,647 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-02-19 17:48:57,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-02-19 17:48:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:48:57,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:57,648 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:57,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1810,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:57,848 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1892138593, now seen corresponding path program 139 times [2021-02-19 17:48:57,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:57,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589966593] [2021-02-19 17:48:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589966593] [2021-02-19 17:48:58,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298431050] [2021-02-19 17:48:58,132 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:48:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:58,279 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 19 treesize of output 15 [2021-02-19 17:48:58,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,286 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 19 treesize of output 15 [2021-02-19 17:48:58,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:58,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:48:58,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:48:58,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,582 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 30 treesize of output 24 [2021-02-19 17:48:58,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:58,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:48:58,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:58,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,643 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 12 treesize of output 5 [2021-02-19 17:48:58,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:58,671 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 23 treesize of output 11 [2021-02-19 17:48:58,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:58,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:58,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:48:58,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:48:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:58,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:58,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:48:58,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825406584] [2021-02-19 17:48:58,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:48:58,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:48:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:48:58,897 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:48:59,975 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 17:49:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:00,117 INFO L93 Difference]: Finished difference Result 541 states and 1592 transitions. [2021-02-19 17:49:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:00,119 INFO L225 Difference]: With dead ends: 541 [2021-02-19 17:49:00,119 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:49:00,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:49:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:49:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 332. [2021-02-19 17:49:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9939577039274923) internal successors, (991), 331 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 991 transitions. [2021-02-19 17:49:00,123 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 991 transitions. Word has length 20 [2021-02-19 17:49:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:00,123 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 991 transitions. [2021-02-19 17:49:00,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 991 transitions. [2021-02-19 17:49:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:00,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:00,124 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:00,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-02-19 17:49:00,324 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1398496765, now seen corresponding path program 140 times [2021-02-19 17:49:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:00,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936703775] [2021-02-19 17:49:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:00,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936703775] [2021-02-19 17:49:00,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457971421] [2021-02-19 17:49:00,621 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:00,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:00,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:00,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:00,769 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 19 treesize of output 15 [2021-02-19 17:49:00,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,775 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 19 treesize of output 15 [2021-02-19 17:49:00,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:00,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:00,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:49:00,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:00,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:01,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:01,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,106 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 12 treesize of output 5 [2021-02-19 17:49:01,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:01,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,172 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 12 treesize of output 5 [2021-02-19 17:49:01,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:01,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:01,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:91, output treesize:41 [2021-02-19 17:49:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:01,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51567830] [2021-02-19 17:49:01,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:01,511 INFO L87 Difference]: Start difference. First operand 332 states and 991 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:02,441 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:49:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:02,594 INFO L93 Difference]: Finished difference Result 545 states and 1616 transitions. [2021-02-19 17:49:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:49:02,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:02,596 INFO L225 Difference]: With dead ends: 545 [2021-02-19 17:49:02,596 INFO L226 Difference]: Without dead ends: 530 [2021-02-19 17:49:02,596 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:49:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-02-19 17:49:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 328. [2021-02-19 17:49:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-02-19 17:49:02,601 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-02-19 17:49:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:02,601 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-02-19 17:49:02,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-02-19 17:49:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:02,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:02,601 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:02,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1834,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:02,803 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1225530383, now seen corresponding path program 141 times [2021-02-19 17:49:02,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:02,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119081302] [2021-02-19 17:49:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119081302] [2021-02-19 17:49:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174821030] [2021-02-19 17:49:03,053 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:03,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,160 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:03,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,164 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 19 treesize of output 15 [2021-02-19 17:49:03,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:03,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:03,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:03,610 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:49:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,617 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 30 treesize of output 24 [2021-02-19 17:49:03,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,626 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:03,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,679 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 23 treesize of output 11 [2021-02-19 17:49:03,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,687 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 12 treesize of output 5 [2021-02-19 17:49:03,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:03,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:03,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:49:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:03,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:03,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:03,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915224830] [2021-02-19 17:49:03,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:03,882 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:04,725 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 17:49:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:04,874 INFO L93 Difference]: Finished difference Result 490 states and 1451 transitions. [2021-02-19 17:49:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:04,876 INFO L225 Difference]: With dead ends: 490 [2021-02-19 17:49:04,876 INFO L226 Difference]: Without dead ends: 475 [2021-02-19 17:49:04,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-19 17:49:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 338. [2021-02-19 17:49:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-02-19 17:49:04,880 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 20 [2021-02-19 17:49:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:04,880 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-02-19 17:49:04,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-02-19 17:49:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:04,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:04,880 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:05,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1841 [2021-02-19 17:49:05,081 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:05,081 INFO L82 PathProgramCache]: Analyzing trace with hash -116380761, now seen corresponding path program 142 times [2021-02-19 17:49:05,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:05,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130969597] [2021-02-19 17:49:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:05,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130969597] [2021-02-19 17:49:05,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720989745] [2021-02-19 17:49:05,334 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:05,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:05,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:05,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,459 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 19 treesize of output 15 [2021-02-19 17:49:05,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,466 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 19 treesize of output 15 [2021-02-19 17:49:05,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:05,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:05,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:05,858 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:49:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,865 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 30 treesize of output 24 [2021-02-19 17:49:05,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:05,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,945 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 23 treesize of output 11 [2021-02-19 17:49:05,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:05,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:05,953 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 12 treesize of output 5 [2021-02-19 17:49:05,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:06,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:06,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:06,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:33 [2021-02-19 17:49:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:06,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:06,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:06,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558722465] [2021-02-19 17:49:06,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:06,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:06,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:06,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:06,215 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:06,902 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 17:49:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:06,998 INFO L93 Difference]: Finished difference Result 496 states and 1464 transitions. [2021-02-19 17:49:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:07,000 INFO L225 Difference]: With dead ends: 496 [2021-02-19 17:49:07,000 INFO L226 Difference]: Without dead ends: 481 [2021-02-19 17:49:07,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:49:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-02-19 17:49:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 336. [2021-02-19 17:49:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.994029850746269) internal successors, (1003), 335 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1003 transitions. [2021-02-19 17:49:07,004 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1003 transitions. Word has length 20 [2021-02-19 17:49:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:07,004 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1003 transitions. [2021-02-19 17:49:07,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1003 transitions. [2021-02-19 17:49:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:07,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:07,005 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:07,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1857 [2021-02-19 17:49:07,206 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:07,206 INFO L82 PathProgramCache]: Analyzing trace with hash 710204209, now seen corresponding path program 143 times [2021-02-19 17:49:07,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:07,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890884895] [2021-02-19 17:49:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890884895] [2021-02-19 17:49:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803082798] [2021-02-19 17:49:07,452 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:07,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:07,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,591 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 19 treesize of output 15 [2021-02-19 17:49:07,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:07,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:07,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:08,004 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:49:08,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:08,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:08,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:08,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,099 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 12 treesize of output 5 [2021-02-19 17:49:08,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,106 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 12 treesize of output 5 [2021-02-19 17:49:08,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:08,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:08,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:35 [2021-02-19 17:49:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:08,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:08,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907409519] [2021-02-19 17:49:08,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:08,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:08,267 INFO L87 Difference]: Start difference. First operand 336 states and 1003 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:09,064 INFO L93 Difference]: Finished difference Result 511 states and 1516 transitions. [2021-02-19 17:49:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:09,066 INFO L225 Difference]: With dead ends: 511 [2021-02-19 17:49:09,067 INFO L226 Difference]: Without dead ends: 496 [2021-02-19 17:49:09,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-02-19 17:49:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 333. [2021-02-19 17:49:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9879518072289155) internal successors, (992), 332 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 992 transitions. [2021-02-19 17:49:09,071 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 992 transitions. Word has length 20 [2021-02-19 17:49:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:09,071 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 992 transitions. [2021-02-19 17:49:09,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 992 transitions. [2021-02-19 17:49:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:09,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:09,072 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:09,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:09,272 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash -143924027, now seen corresponding path program 144 times [2021-02-19 17:49:09,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:09,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187747009] [2021-02-19 17:49:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:09,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187747009] [2021-02-19 17:49:09,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209993305] [2021-02-19 17:49:09,585 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:49:09,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:09,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,742 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 19 treesize of output 15 [2021-02-19 17:49:09,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,751 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 19 treesize of output 15 [2021-02-19 17:49:09,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:09,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:09,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:09,954 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-02-19 17:49:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:09,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:09,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:10,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,015 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 12 treesize of output 5 [2021-02-19 17:49:10,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:10,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:10,019 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 12 treesize of output 5 [2021-02-19 17:49:10,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:10,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:10,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:10,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:49:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:10,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:10,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218601427] [2021-02-19 17:49:10,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:10,340 INFO L87 Difference]: Start difference. First operand 333 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:11,093 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:49:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:11,241 INFO L93 Difference]: Finished difference Result 492 states and 1455 transitions. [2021-02-19 17:49:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:49:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:11,244 INFO L225 Difference]: With dead ends: 492 [2021-02-19 17:49:11,244 INFO L226 Difference]: Without dead ends: 477 [2021-02-19 17:49:11,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-02-19 17:49:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 332. [2021-02-19 17:49:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-02-19 17:49:11,248 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-02-19 17:49:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:11,248 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-02-19 17:49:11,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-02-19 17:49:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:11,249 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:11,249 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:11,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1887 [2021-02-19 17:49:11,450 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1750952103, now seen corresponding path program 145 times [2021-02-19 17:49:11,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:11,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43986235] [2021-02-19 17:49:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:11,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43986235] [2021-02-19 17:49:11,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271168439] [2021-02-19 17:49:11,699 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:11,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:11,870 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 19 treesize of output 15 [2021-02-19 17:49:11,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:11,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:11,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:11,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-02-19 17:49:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:11,946 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 20 treesize of output 16 [2021-02-19 17:49:11,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:11,953 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 20 treesize of output 16 [2021-02-19 17:49:11,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:12,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:12,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:12,030 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 12 treesize of output 5 [2021-02-19 17:49:12,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:12,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:12,038 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 12 treesize of output 5 [2021-02-19 17:49:12,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:12,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:12,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:12,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:95, output treesize:35 [2021-02-19 17:49:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:12,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:12,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407924245] [2021-02-19 17:49:12,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:12,315 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:12,706 INFO L93 Difference]: Finished difference Result 465 states and 1385 transitions. [2021-02-19 17:49:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:49:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:12,708 INFO L225 Difference]: With dead ends: 465 [2021-02-19 17:49:12,708 INFO L226 Difference]: Without dead ends: 450 [2021-02-19 17:49:12,708 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-02-19 17:49:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 329. [2021-02-19 17:49:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-02-19 17:49:12,713 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 20 [2021-02-19 17:49:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:12,713 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-02-19 17:49:12,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-02-19 17:49:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:12,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:12,713 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:12,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-02-19 17:49:12,914 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1546018877, now seen corresponding path program 146 times [2021-02-19 17:49:12,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:12,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236715718] [2021-02-19 17:49:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:13,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236715718] [2021-02-19 17:49:13,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181553985] [2021-02-19 17:49:13,126 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:13,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:13,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:13,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:13,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,264 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 19 treesize of output 15 [2021-02-19 17:49:13,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:49:13,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-02-19 17:49:13,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,352 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 20 treesize of output 16 [2021-02-19 17:49:13,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,360 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 20 treesize of output 16 [2021-02-19 17:49:13,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,457 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 12 treesize of output 5 [2021-02-19 17:49:13,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:13,465 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 12 treesize of output 5 [2021-02-19 17:49:13,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:13,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:13,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:101, output treesize:41 [2021-02-19 17:49:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:13,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:13,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:13,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88638338] [2021-02-19 17:49:13,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:13,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:13,842 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:14,515 INFO L93 Difference]: Finished difference Result 426 states and 1248 transitions. [2021-02-19 17:49:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:14,517 INFO L225 Difference]: With dead ends: 426 [2021-02-19 17:49:14,517 INFO L226 Difference]: Without dead ends: 411 [2021-02-19 17:49:14,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-19 17:49:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 328. [2021-02-19 17:49:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.981651376146789) internal successors, (975), 327 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 975 transitions. [2021-02-19 17:49:14,521 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 975 transitions. Word has length 20 [2021-02-19 17:49:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:14,521 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 975 transitions. [2021-02-19 17:49:14,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 975 transitions. [2021-02-19 17:49:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:14,521 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:14,521 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:14,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1898 [2021-02-19 17:49:14,722 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1043516121, now seen corresponding path program 147 times [2021-02-19 17:49:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:14,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686668551] [2021-02-19 17:49:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:14,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686668551] [2021-02-19 17:49:14,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901330782] [2021-02-19 17:49:14,982 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:15,113 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 19 treesize of output 15 [2021-02-19 17:49:15,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,119 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 19 treesize of output 15 [2021-02-19 17:49:15,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:15,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:49:15,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:15,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,560 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 12 treesize of output 5 [2021-02-19 17:49:15,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,619 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 30 treesize of output 24 [2021-02-19 17:49:15,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:15,651 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 23 treesize of output 11 [2021-02-19 17:49:15,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:15,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:15,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:15,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:83, output treesize:33 [2021-02-19 17:49:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:15,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:15,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000522388] [2021-02-19 17:49:15,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:15,817 INFO L87 Difference]: Start difference. First operand 328 states and 975 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:16,463 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 17:49:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:16,730 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2021-02-19 17:49:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:16,733 INFO L225 Difference]: With dead ends: 450 [2021-02-19 17:49:16,733 INFO L226 Difference]: Without dead ends: 435 [2021-02-19 17:49:16,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-02-19 17:49:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 334. [2021-02-19 17:49:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.990990990990991) internal successors, (996), 333 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 996 transitions. [2021-02-19 17:49:16,737 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 996 transitions. Word has length 20 [2021-02-19 17:49:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:16,737 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 996 transitions. [2021-02-19 17:49:16,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 996 transitions. [2021-02-19 17:49:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:16,738 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:16,738 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:16,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:16,938 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:16,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2047848059, now seen corresponding path program 148 times [2021-02-19 17:49:16,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:16,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692425880] [2021-02-19 17:49:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692425880] [2021-02-19 17:49:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654244320] [2021-02-19 17:49:17,246 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:17,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:17,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:17,331 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 19 treesize of output 15 [2021-02-19 17:49:17,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,335 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 19 treesize of output 15 [2021-02-19 17:49:17,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:17,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:17,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:49:17,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:17,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:17,510 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 12 treesize of output 5 [2021-02-19 17:49:17,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:17,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:17,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:17,649 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 12 treesize of output 5 [2021-02-19 17:49:17,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:17,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:17,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:17,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:91, output treesize:41 [2021-02-19 17:49:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076318560] [2021-02-19 17:49:18,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:18,001 INFO L87 Difference]: Start difference. First operand 334 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:18,776 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:49:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:18,937 INFO L93 Difference]: Finished difference Result 472 states and 1401 transitions. [2021-02-19 17:49:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:49:18,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:18,940 INFO L225 Difference]: With dead ends: 472 [2021-02-19 17:49:18,940 INFO L226 Difference]: Without dead ends: 457 [2021-02-19 17:49:18,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-02-19 17:49:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 331. [2021-02-19 17:49:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-02-19 17:49:18,944 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-02-19 17:49:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:18,944 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-02-19 17:49:18,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-02-19 17:49:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:18,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:18,945 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:19,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1919 [2021-02-19 17:49:19,145 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 909552023, now seen corresponding path program 149 times [2021-02-19 17:49:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:19,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196657250] [2021-02-19 17:49:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:19,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196657250] [2021-02-19 17:49:19,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203472429] [2021-02-19 17:49:19,339 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:19,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:49:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:49:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:19,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,474 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 19 treesize of output 15 [2021-02-19 17:49:19,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,482 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 19 treesize of output 15 [2021-02-19 17:49:19,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:19,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:19,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:67 [2021-02-19 17:49:19,694 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-02-19 17:49:19,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,702 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 20 treesize of output 16 [2021-02-19 17:49:19,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:49:19,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,723 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 20 treesize of output 16 [2021-02-19 17:49:19,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,732 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 20 treesize of output 16 [2021-02-19 17:49:19,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,908 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:49:19,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,916 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 12 treesize of output 5 [2021-02-19 17:49:19,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,926 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 12 treesize of output 5 [2021-02-19 17:49:19,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,936 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 12 treesize of output 5 [2021-02-19 17:49:19,938 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:19,944 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 12 treesize of output 5 [2021-02-19 17:49:19,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,112 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 17:49:20,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:20,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:49:20,116 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:209, output treesize:101 [2021-02-19 17:49:20,250 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-02-19 17:49:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:20,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:20,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:20,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540494339] [2021-02-19 17:49:20,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:20,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:20,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:20,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:20,633 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:21,486 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:49:21,981 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 17:49:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:22,072 INFO L93 Difference]: Finished difference Result 420 states and 1220 transitions. [2021-02-19 17:49:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:49:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:22,073 INFO L225 Difference]: With dead ends: 420 [2021-02-19 17:49:22,073 INFO L226 Difference]: Without dead ends: 390 [2021-02-19 17:49:22,074 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-02-19 17:49:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2021-02-19 17:49:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.98159509202454) internal successors, (972), 326 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 972 transitions. [2021-02-19 17:49:22,077 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 972 transitions. Word has length 20 [2021-02-19 17:49:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:22,077 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 972 transitions. [2021-02-19 17:49:22,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 972 transitions. [2021-02-19 17:49:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:22,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:22,078 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:22,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1926 [2021-02-19 17:49:22,293 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1695650691, now seen corresponding path program 150 times [2021-02-19 17:49:22,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:22,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072108511] [2021-02-19 17:49:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:22,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072108511] [2021-02-19 17:49:22,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530940105] [2021-02-19 17:49:22,515 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:22,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:22,580 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 19 treesize of output 15 [2021-02-19 17:49:22,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,584 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 19 treesize of output 15 [2021-02-19 17:49:22,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:22,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:22,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:49:22,829 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 30 treesize of output 24 [2021-02-19 17:49:22,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:22,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:22,870 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:49:22,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:22,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:49:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:23,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:23,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776583683] [2021-02-19 17:49:23,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:23,085 INFO L87 Difference]: Start difference. First operand 327 states and 972 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:23,773 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:49:24,065 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:49:24,240 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 17:49:24,562 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:49:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:24,677 INFO L93 Difference]: Finished difference Result 635 states and 1892 transitions. [2021-02-19 17:49:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:49:24,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:49:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:24,680 INFO L225 Difference]: With dead ends: 635 [2021-02-19 17:49:24,680 INFO L226 Difference]: Without dead ends: 605 [2021-02-19 17:49:24,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:49:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-02-19 17:49:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 330. [2021-02-19 17:49:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-02-19 17:49:24,685 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-02-19 17:49:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:24,685 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-02-19 17:49:24,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-02-19 17:49:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:24,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:24,686 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:24,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1937,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:24,886 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 432101457, now seen corresponding path program 151 times [2021-02-19 17:49:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:24,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600492827] [2021-02-19 17:49:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600492827] [2021-02-19 17:49:25,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099183734] [2021-02-19 17:49:25,154 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:25,256 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 19 treesize of output 15 [2021-02-19 17:49:25,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:25,262 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 19 treesize of output 15 [2021-02-19 17:49:25,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:25,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:25,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:25,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:49:25,502 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 30 treesize of output 24 [2021-02-19 17:49:25,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:25,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:25,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:25,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:25,542 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:49:25,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:25,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:49:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:25,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:25,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:25,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795440730] [2021-02-19 17:49:25,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:25,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:25,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:25,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:25,783 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:26,374 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:49:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:26,696 INFO L93 Difference]: Finished difference Result 485 states and 1435 transitions. [2021-02-19 17:49:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:49:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:26,698 INFO L225 Difference]: With dead ends: 485 [2021-02-19 17:49:26,698 INFO L226 Difference]: Without dead ends: 470 [2021-02-19 17:49:26,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-02-19 17:49:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 336. [2021-02-19 17:49:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.991044776119403) internal successors, (1002), 335 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1002 transitions. [2021-02-19 17:49:26,702 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1002 transitions. Word has length 20 [2021-02-19 17:49:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:26,703 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1002 transitions. [2021-02-19 17:49:26,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1002 transitions. [2021-02-19 17:49:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:26,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:26,703 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:26,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1947,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:26,904 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash -572230481, now seen corresponding path program 152 times [2021-02-19 17:49:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:26,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560490968] [2021-02-19 17:49:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:27,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560490968] [2021-02-19 17:49:27,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21965440] [2021-02-19 17:49:27,172 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:27,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:49:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:27,281 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 19 treesize of output 15 [2021-02-19 17:49:27,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:27,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:21 [2021-02-19 17:49:27,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:27,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:27,359 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:49:27,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:27,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:15 [2021-02-19 17:49:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:27,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:27,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:27,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927926943] [2021-02-19 17:49:27,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:27,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:27,530 INFO L87 Difference]: Start difference. First operand 336 states and 1002 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:28,026 INFO L93 Difference]: Finished difference Result 494 states and 1453 transitions. [2021-02-19 17:49:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:49:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:49:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:28,027 INFO L225 Difference]: With dead ends: 494 [2021-02-19 17:49:28,027 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 17:49:28,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 17:49:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 333. [2021-02-19 17:49:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9819277108433737) internal successors, (990), 332 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 990 transitions. [2021-02-19 17:49:28,031 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 990 transitions. Word has length 20 [2021-02-19 17:49:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:28,031 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 990 transitions. [2021-02-19 17:49:28,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 990 transitions. [2021-02-19 17:49:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:28,032 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:28,032 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:28,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:28,232 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1909797695, now seen corresponding path program 153 times [2021-02-19 17:49:28,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:28,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459379663] [2021-02-19 17:49:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459379663] [2021-02-19 17:49:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041288954] [2021-02-19 17:49:28,432 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:28,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:49:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:28,550 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 19 treesize of output 15 [2021-02-19 17:49:28,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:28,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:49:28,609 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 20 treesize of output 16 [2021-02-19 17:49:28,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:49:28,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:28,670 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:49:28,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:28,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:49:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:28,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:28,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:49:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751391636] [2021-02-19 17:49:28,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:28,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:28,978 INFO L87 Difference]: Start difference. First operand 333 states and 990 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:29,561 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:49:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:29,667 INFO L93 Difference]: Finished difference Result 433 states and 1277 transitions. [2021-02-19 17:49:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:49:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:29,669 INFO L225 Difference]: With dead ends: 433 [2021-02-19 17:49:29,669 INFO L226 Difference]: Without dead ends: 418 [2021-02-19 17:49:29,669 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-02-19 17:49:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 326. [2021-02-19 17:49:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-02-19 17:49:29,673 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-02-19 17:49:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:29,673 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-02-19 17:49:29,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-02-19 17:49:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:29,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:29,674 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:29,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:29,874 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1618685297, now seen corresponding path program 154 times [2021-02-19 17:49:29,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:29,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300847770] [2021-02-19 17:49:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:30,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300847770] [2021-02-19 17:49:30,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841285148] [2021-02-19 17:49:30,104 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:30,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,302 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 26 treesize of output 20 [2021-02-19 17:49:30,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,311 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 19 treesize of output 15 [2021-02-19 17:49:30,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:30,377 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:49:30,722 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:30,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:30,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,740 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 30 treesize of output 24 [2021-02-19 17:49:30,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,810 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 12 treesize of output 5 [2021-02-19 17:49:30,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,819 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 23 treesize of output 11 [2021-02-19 17:49:30,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:30,885 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:49:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:31,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:31,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:31,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099429268] [2021-02-19 17:49:31,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:31,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:31,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:31,030 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:31,208 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:49:31,472 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:49:32,284 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:49:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:32,576 INFO L93 Difference]: Finished difference Result 530 states and 1566 transitions. [2021-02-19 17:49:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:32,579 INFO L225 Difference]: With dead ends: 530 [2021-02-19 17:49:32,579 INFO L226 Difference]: Without dead ends: 515 [2021-02-19 17:49:32,579 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-02-19 17:49:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 331. [2021-02-19 17:49:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-02-19 17:49:32,584 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 20 [2021-02-19 17:49:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:32,584 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-02-19 17:49:32,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-02-19 17:49:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:32,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:32,584 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:32,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-02-19 17:49:32,785 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1567132377, now seen corresponding path program 155 times [2021-02-19 17:49:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:32,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828893492] [2021-02-19 17:49:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828893492] [2021-02-19 17:49:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666235356] [2021-02-19 17:49:33,091 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:33,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:33,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,365 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 26 treesize of output 20 [2021-02-19 17:49:33,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,374 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 19 treesize of output 15 [2021-02-19 17:49:33,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:33,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:33,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:49:33,579 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:33,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:33,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,591 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 30 treesize of output 24 [2021-02-19 17:49:33,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:49:33,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:33,639 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 12 treesize of output 5 [2021-02-19 17:49:33,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:33,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:33,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:33,676 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:49:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:33,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:33,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:33,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423638808] [2021-02-19 17:49:33,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:33,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:33,815 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:34,000 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:49:34,259 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:49:34,683 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:49:35,258 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:49:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:35,549 INFO L93 Difference]: Finished difference Result 536 states and 1579 transitions. [2021-02-19 17:49:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:35,551 INFO L225 Difference]: With dead ends: 536 [2021-02-19 17:49:35,551 INFO L226 Difference]: Without dead ends: 521 [2021-02-19 17:49:35,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-02-19 17:49:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 329. [2021-02-19 17:49:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:49:35,556 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:49:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:35,556 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:49:35,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:49:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:35,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:35,556 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:35,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:35,757 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2073478643, now seen corresponding path program 156 times [2021-02-19 17:49:35,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:35,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112322212] [2021-02-19 17:49:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:35,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112322212] [2021-02-19 17:49:35,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629018676] [2021-02-19 17:49:35,986 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:36,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,254 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 19 treesize of output 15 [2021-02-19 17:49:36,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,263 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 26 treesize of output 20 [2021-02-19 17:49:36,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:36,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:36,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:71 [2021-02-19 17:49:36,482 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:49:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:36,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,500 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 30 treesize of output 24 [2021-02-19 17:49:36,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:36,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,582 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 12 treesize of output 5 [2021-02-19 17:49:36,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:36,591 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 23 treesize of output 11 [2021-02-19 17:49:36,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:36,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:36,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:36,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:49:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:36,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:36,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:36,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40794676] [2021-02-19 17:49:36,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:36,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:36,897 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:37,076 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:49:37,580 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:49:38,131 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:49:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:38,396 INFO L93 Difference]: Finished difference Result 527 states and 1557 transitions. [2021-02-19 17:49:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:38,399 INFO L225 Difference]: With dead ends: 527 [2021-02-19 17:49:38,399 INFO L226 Difference]: Without dead ends: 512 [2021-02-19 17:49:38,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-02-19 17:49:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 327. [2021-02-19 17:49:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:49:38,403 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:49:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:38,403 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:49:38,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:49:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:38,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:38,404 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:38,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-02-19 17:49:38,604 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash 549166291, now seen corresponding path program 157 times [2021-02-19 17:49:38,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:38,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057559423] [2021-02-19 17:49:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:38,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057559423] [2021-02-19 17:49:38,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908497047] [2021-02-19 17:49:38,936 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:38,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:39,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,122 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 19 treesize of output 15 [2021-02-19 17:49:39,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,130 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 19 treesize of output 15 [2021-02-19 17:49:39,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:39,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:39,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:39,614 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:39,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,624 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 30 treesize of output 24 [2021-02-19 17:49:39,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,687 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 23 treesize of output 11 [2021-02-19 17:49:39,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:39,698 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 12 treesize of output 5 [2021-02-19 17:49:39,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:39,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:39,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-02-19 17:49:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:39,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185947978] [2021-02-19 17:49:39,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:39,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:39,926 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:40,083 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:49:40,315 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:49:40,686 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:49:41,452 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 17:49:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:41,611 INFO L93 Difference]: Finished difference Result 553 states and 1628 transitions. [2021-02-19 17:49:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:41,613 INFO L225 Difference]: With dead ends: 553 [2021-02-19 17:49:41,613 INFO L226 Difference]: Without dead ends: 538 [2021-02-19 17:49:41,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-02-19 17:49:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 333. [2021-02-19 17:49:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2021-02-19 17:49:41,618 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 20 [2021-02-19 17:49:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:41,618 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2021-02-19 17:49:41,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2021-02-19 17:49:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:41,618 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:41,618 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:41,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2008 [2021-02-19 17:49:41,833 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1658315913, now seen corresponding path program 158 times [2021-02-19 17:49:41,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:41,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155700223] [2021-02-19 17:49:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:42,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155700223] [2021-02-19 17:49:42,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088626315] [2021-02-19 17:49:42,204 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:42,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,415 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 19 treesize of output 15 [2021-02-19 17:49:42,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,426 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 19 treesize of output 15 [2021-02-19 17:49:42,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:42,516 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:42,912 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:42,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:42,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:42,931 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 30 treesize of output 24 [2021-02-19 17:49:42,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:43,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:43,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:43,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:43,014 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 12 treesize of output 5 [2021-02-19 17:49:43,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:43,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:43,024 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 23 treesize of output 11 [2021-02-19 17:49:43,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:43,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:43,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:43,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:49:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:43,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:43,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522130729] [2021-02-19 17:49:43,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:43,365 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:43,549 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:49:44,002 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:49:44,732 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 17:49:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:44,927 INFO L93 Difference]: Finished difference Result 559 states and 1641 transitions. [2021-02-19 17:49:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:44,930 INFO L225 Difference]: With dead ends: 559 [2021-02-19 17:49:44,930 INFO L226 Difference]: Without dead ends: 544 [2021-02-19 17:49:44,930 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-02-19 17:49:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 331. [2021-02-19 17:49:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.996969696969697) internal successors, (989), 330 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 989 transitions. [2021-02-19 17:49:44,934 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 989 transitions. Word has length 20 [2021-02-19 17:49:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:44,934 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 989 transitions. [2021-02-19 17:49:44,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 989 transitions. [2021-02-19 17:49:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:44,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:44,935 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:45,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-02-19 17:49:45,135 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1810066413, now seen corresponding path program 159 times [2021-02-19 17:49:45,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:45,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232232632] [2021-02-19 17:49:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232232632] [2021-02-19 17:49:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254362637] [2021-02-19 17:49:45,481 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:45,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:45,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,593 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 19 treesize of output 15 [2021-02-19 17:49:45,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:45,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:45,598 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 19 treesize of output 15 [2021-02-19 17:49:45,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:45,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:45,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:45,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:46,053 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:46,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:46,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:46,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,162 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 12 treesize of output 5 [2021-02-19 17:49:46,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:46,171 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 12 treesize of output 5 [2021-02-19 17:49:46,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:46,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:46,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:46,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:35 [2021-02-19 17:49:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:46,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:46,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511063887] [2021-02-19 17:49:46,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:46,512 INFO L87 Difference]: Start difference. First operand 331 states and 989 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:46,697 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 17:49:46,954 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 17:49:47,366 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-02-19 17:49:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:47,988 INFO L93 Difference]: Finished difference Result 554 states and 1643 transitions. [2021-02-19 17:49:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:47,991 INFO L225 Difference]: With dead ends: 554 [2021-02-19 17:49:47,992 INFO L226 Difference]: Without dead ends: 539 [2021-02-19 17:49:47,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-02-19 17:49:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 328. [2021-02-19 17:49:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9908256880733943) internal successors, (978), 327 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 978 transitions. [2021-02-19 17:49:47,996 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 978 transitions. Word has length 20 [2021-02-19 17:49:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:47,996 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 978 transitions. [2021-02-19 17:49:47,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 978 transitions. [2021-02-19 17:49:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:47,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:47,997 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:48,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:48,197 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:48,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1630772647, now seen corresponding path program 160 times [2021-02-19 17:49:48,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:48,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418470959] [2021-02-19 17:49:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:48,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418470959] [2021-02-19 17:49:48,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174778470] [2021-02-19 17:49:48,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:48,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:48,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,637 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:48,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:48,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,646 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 19 treesize of output 15 [2021-02-19 17:49:48,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:48,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:48,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:48,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:48,927 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:48,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:48,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:48,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:48,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:48,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:49,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,051 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 12 treesize of output 5 [2021-02-19 17:49:49,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:49,060 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 12 treesize of output 5 [2021-02-19 17:49:49,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:49,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:49,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:49,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:49:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:49,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:49,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:49,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732289295] [2021-02-19 17:49:49,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:49,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:49,490 INFO L87 Difference]: Start difference. First operand 328 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:50,035 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:49:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:50,204 INFO L93 Difference]: Finished difference Result 422 states and 1235 transitions. [2021-02-19 17:49:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:50,207 INFO L225 Difference]: With dead ends: 422 [2021-02-19 17:49:50,207 INFO L226 Difference]: Without dead ends: 407 [2021-02-19 17:49:50,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-02-19 17:49:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 327. [2021-02-19 17:49:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:49:50,211 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:49:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:50,211 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:49:50,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:49:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:50,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:50,212 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:50,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:50,413 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1367647407, now seen corresponding path program 161 times [2021-02-19 17:49:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:50,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864697866] [2021-02-19 17:49:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:50,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864697866] [2021-02-19 17:49:50,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060078367] [2021-02-19 17:49:50,795 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:50,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:50,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,986 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 19 treesize of output 15 [2021-02-19 17:49:50,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:50,995 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 19 treesize of output 15 [2021-02-19 17:49:50,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:51,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:51,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:51,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:51,516 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:49:51,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:51,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:51,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:49:51,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:51,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:51,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,631 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 12 treesize of output 5 [2021-02-19 17:49:51,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:51,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,642 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 23 treesize of output 11 [2021-02-19 17:49:51,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:51,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:51,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:51,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:33 [2021-02-19 17:49:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:51,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:51,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059276066] [2021-02-19 17:49:51,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:51,997 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:52,196 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:49:52,462 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 17:49:52,736 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 17:49:52,941 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 17:49:53,423 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 17:49:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:53,654 INFO L93 Difference]: Finished difference Result 547 states and 1610 transitions. [2021-02-19 17:49:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:53,656 INFO L225 Difference]: With dead ends: 547 [2021-02-19 17:49:53,656 INFO L226 Difference]: Without dead ends: 532 [2021-02-19 17:49:53,657 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-02-19 17:49:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 330. [2021-02-19 17:49:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-02-19 17:49:53,661 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 20 [2021-02-19 17:49:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:53,661 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-02-19 17:49:53,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-02-19 17:49:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:53,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:53,662 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:53,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-02-19 17:49:53,862 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash 363315469, now seen corresponding path program 162 times [2021-02-19 17:49:53,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:53,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194832711] [2021-02-19 17:49:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194832711] [2021-02-19 17:49:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108917987] [2021-02-19 17:49:54,226 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:54,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:49:54,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,427 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 19 treesize of output 15 [2021-02-19 17:49:54,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,435 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 19 treesize of output 15 [2021-02-19 17:49:54,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:54,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-02-19 17:49:54,732 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-02-19 17:49:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:54,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:54,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,861 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 12 treesize of output 5 [2021-02-19 17:49:54,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:54,870 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 12 treesize of output 5 [2021-02-19 17:49:54,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:54,976 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:49:54,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:54,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:54,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:103, output treesize:41 [2021-02-19 17:49:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:55,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:55,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:55,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600505402] [2021-02-19 17:49:55,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:55,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:55,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:55,336 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:55,522 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:49:55,739 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 17:49:55,984 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 17:49:56,160 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 17:49:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:56,783 INFO L93 Difference]: Finished difference Result 551 states and 1634 transitions. [2021-02-19 17:49:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:49:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:56,785 INFO L225 Difference]: With dead ends: 551 [2021-02-19 17:49:56,785 INFO L226 Difference]: Without dead ends: 536 [2021-02-19 17:49:56,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:49:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-02-19 17:49:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 326. [2021-02-19 17:49:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-02-19 17:49:56,789 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-02-19 17:49:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:56,789 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-02-19 17:49:56,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-02-19 17:49:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:56,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:56,790 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:56,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:56,990 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2034255617, now seen corresponding path program 163 times [2021-02-19 17:49:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:56,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665961865] [2021-02-19 17:49:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665961865] [2021-02-19 17:49:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589507950] [2021-02-19 17:49:57,316 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:49:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,490 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 19 treesize of output 15 [2021-02-19 17:49:57,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:57,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:57,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:57,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:57,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:57,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:49:57,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:49:58,202 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:49:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:49:58,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,221 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 30 treesize of output 24 [2021-02-19 17:49:58,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:58,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,296 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 23 treesize of output 11 [2021-02-19 17:49:58,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:58,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:58,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:49:58,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:27 [2021-02-19 17:49:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:58,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:58,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:49:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250969520] [2021-02-19 17:49:58,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:58,539 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:59,332 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 17:49:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:59,566 INFO L93 Difference]: Finished difference Result 488 states and 1445 transitions. [2021-02-19 17:49:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:49:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:49:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:59,569 INFO L225 Difference]: With dead ends: 488 [2021-02-19 17:49:59,569 INFO L226 Difference]: Without dead ends: 473 [2021-02-19 17:49:59,569 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:49:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-02-19 17:49:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 336. [2021-02-19 17:49:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-02-19 17:49:59,574 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 20 [2021-02-19 17:49:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:59,574 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-02-19 17:49:59,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:49:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-02-19 17:49:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:49:59,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:59,574 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:59,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2081 [2021-02-19 17:49:59,775 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:59,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1151562057, now seen corresponding path program 164 times [2021-02-19 17:49:59,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:59,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755455466] [2021-02-19 17:49:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755455466] [2021-02-19 17:50:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405563287] [2021-02-19 17:50:00,159 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:00,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:00,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:00,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,315 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 19 treesize of output 15 [2021-02-19 17:50:00,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,325 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 19 treesize of output 15 [2021-02-19 17:50:00,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:00,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:00,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-02-19 17:50:00,652 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-02-19 17:50:00,659 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 30 treesize of output 24 [2021-02-19 17:50:00,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:00,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,741 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 23 treesize of output 11 [2021-02-19 17:50:00,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:00,751 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 12 treesize of output 5 [2021-02-19 17:50:00,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:00,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:00,816 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-02-19 17:50:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:01,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:01,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716325631] [2021-02-19 17:50:01,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:01,131 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:02,071 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:50:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:02,304 INFO L93 Difference]: Finished difference Result 494 states and 1458 transitions. [2021-02-19 17:50:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:02,307 INFO L225 Difference]: With dead ends: 494 [2021-02-19 17:50:02,307 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 17:50:02,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 17:50:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 334. [2021-02-19 17:50:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.993993993993994) internal successors, (997), 333 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 997 transitions. [2021-02-19 17:50:02,311 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 997 transitions. Word has length 20 [2021-02-19 17:50:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:02,312 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 997 transitions. [2021-02-19 17:50:02,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 997 transitions. [2021-02-19 17:50:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:02,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:02,312 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:02,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:02,513 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash -324977087, now seen corresponding path program 165 times [2021-02-19 17:50:02,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:02,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519122185] [2021-02-19 17:50:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519122185] [2021-02-19 17:50:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244972886] [2021-02-19 17:50:02,897 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:02,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:50:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,079 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 19 treesize of output 15 [2021-02-19 17:50:03,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,089 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 19 treesize of output 15 [2021-02-19 17:50:03,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:03,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:50:03,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:50:03,594 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:50:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:03,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:03,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:03,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:03,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,720 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 12 treesize of output 5 [2021-02-19 17:50:03,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:03,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:03,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:91, output treesize:35 [2021-02-19 17:50:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:04,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:04,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668929486] [2021-02-19 17:50:04,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:04,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:04,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:04,089 INFO L87 Difference]: Start difference. First operand 334 states and 997 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:04,985 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:50:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:05,119 INFO L93 Difference]: Finished difference Result 509 states and 1510 transitions. [2021-02-19 17:50:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:05,121 INFO L225 Difference]: With dead ends: 509 [2021-02-19 17:50:05,121 INFO L226 Difference]: Without dead ends: 494 [2021-02-19 17:50:05,122 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-02-19 17:50:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 331. [2021-02-19 17:50:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.987878787878788) internal successors, (986), 330 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 986 transitions. [2021-02-19 17:50:05,126 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 986 transitions. Word has length 20 [2021-02-19 17:50:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:05,126 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 986 transitions. [2021-02-19 17:50:05,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 986 transitions. [2021-02-19 17:50:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:05,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:05,127 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:05,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2108,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:05,327 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1179105323, now seen corresponding path program 166 times [2021-02-19 17:50:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:05,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613748706] [2021-02-19 17:50:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:05,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613748706] [2021-02-19 17:50:05,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411767569] [2021-02-19 17:50:05,704 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:50:05,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,901 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 19 treesize of output 15 [2021-02-19 17:50:05,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:05,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:05,912 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 19 treesize of output 15 [2021-02-19 17:50:05,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:06,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:06,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:50:06,017 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-02-19 17:50:06,223 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-02-19 17:50:06,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:06,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:06,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:06,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:06,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:06,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,345 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 12 treesize of output 5 [2021-02-19 17:50:06,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:06,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:06,355 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 12 treesize of output 5 [2021-02-19 17:50:06,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:06,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:06,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:06,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:101, output treesize:41 [2021-02-19 17:50:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:06,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:06,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:06,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75217644] [2021-02-19 17:50:06,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:06,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:06,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:06,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:06,666 INFO L87 Difference]: Start difference. First operand 331 states and 986 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:07,221 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:50:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:07,357 INFO L93 Difference]: Finished difference Result 423 states and 1238 transitions. [2021-02-19 17:50:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:07,360 INFO L225 Difference]: With dead ends: 423 [2021-02-19 17:50:07,360 INFO L226 Difference]: Without dead ends: 408 [2021-02-19 17:50:07,360 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-02-19 17:50:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 330. [2021-02-19 17:50:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9817629179331306) internal successors, (981), 329 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 981 transitions. [2021-02-19 17:50:07,368 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 981 transitions. Word has length 20 [2021-02-19 17:50:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:07,369 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 981 transitions. [2021-02-19 17:50:07,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 981 transitions. [2021-02-19 17:50:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:07,369 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:07,369 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:07,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2118 [2021-02-19 17:50:07,574 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash 715770807, now seen corresponding path program 167 times [2021-02-19 17:50:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:07,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805365253] [2021-02-19 17:50:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:07,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805365253] [2021-02-19 17:50:07,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284567455] [2021-02-19 17:50:07,930 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:07,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:08,188 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 19 treesize of output 15 [2021-02-19 17:50:08,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:08,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:08,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:08,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:25 [2021-02-19 17:50:08,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,300 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 20 treesize of output 16 [2021-02-19 17:50:08,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:08,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,311 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 20 treesize of output 16 [2021-02-19 17:50:08,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:08,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:08,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,407 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 12 treesize of output 5 [2021-02-19 17:50:08,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:08,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:08,416 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 12 treesize of output 5 [2021-02-19 17:50:08,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:08,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:08,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:08,494 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:35 [2021-02-19 17:50:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:08,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:08,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:08,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054380002] [2021-02-19 17:50:08,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:08,672 INFO L87 Difference]: Start difference. First operand 330 states and 981 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:09,554 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:50:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:09,698 INFO L93 Difference]: Finished difference Result 463 states and 1379 transitions. [2021-02-19 17:50:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:50:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:09,700 INFO L225 Difference]: With dead ends: 463 [2021-02-19 17:50:09,700 INFO L226 Difference]: Without dead ends: 448 [2021-02-19 17:50:09,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-02-19 17:50:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 327. [2021-02-19 17:50:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2021-02-19 17:50:09,705 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 20 [2021-02-19 17:50:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:09,705 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2021-02-19 17:50:09,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2021-02-19 17:50:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:09,705 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:09,706 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:09,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2125,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:09,906 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 510837581, now seen corresponding path program 168 times [2021-02-19 17:50:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:09,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887302614] [2021-02-19 17:50:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887302614] [2021-02-19 17:50:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048674347] [2021-02-19 17:50:10,306 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:10,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:10,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:10,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:10,475 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 19 treesize of output 15 [2021-02-19 17:50:10,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:10,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:10,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:10,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:50:10,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,594 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 20 treesize of output 16 [2021-02-19 17:50:10,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,605 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 20 treesize of output 16 [2021-02-19 17:50:10,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:10,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,708 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 12 treesize of output 5 [2021-02-19 17:50:10,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:10,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:10,718 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 12 treesize of output 5 [2021-02-19 17:50:10,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:10,825 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-19 17:50:10,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:10,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:10,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:89, output treesize:41 [2021-02-19 17:50:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:11,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:11,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:11,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933900152] [2021-02-19 17:50:11,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:11,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:11,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:11,211 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:12,181 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:50:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:12,349 INFO L93 Difference]: Finished difference Result 489 states and 1447 transitions. [2021-02-19 17:50:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:50:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:12,351 INFO L225 Difference]: With dead ends: 489 [2021-02-19 17:50:12,351 INFO L226 Difference]: Without dead ends: 474 [2021-02-19 17:50:12,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-02-19 17:50:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 326. [2021-02-19 17:50:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-02-19 17:50:12,355 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-02-19 17:50:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:12,355 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-02-19 17:50:12,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-02-19 17:50:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:12,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:12,356 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:12,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:12,557 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2078697417, now seen corresponding path program 169 times [2021-02-19 17:50:12,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:12,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132045332] [2021-02-19 17:50:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132045332] [2021-02-19 17:50:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382575854] [2021-02-19 17:50:12,959 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,117 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 19 treesize of output 15 [2021-02-19 17:50:13,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,127 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 19 treesize of output 15 [2021-02-19 17:50:13,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:13,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:13,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:63 [2021-02-19 17:50:13,468 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-02-19 17:50:13,475 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 30 treesize of output 24 [2021-02-19 17:50:13,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:13,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:13,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,567 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 12 treesize of output 5 [2021-02-19 17:50:13,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,577 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 23 treesize of output 11 [2021-02-19 17:50:13,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:13,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:13,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:87, output treesize:33 [2021-02-19 17:50:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:13,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:13,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:13,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403102259] [2021-02-19 17:50:13,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:13,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:13,939 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:14,686 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 17:50:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:14,949 INFO L93 Difference]: Finished difference Result 452 states and 1338 transitions. [2021-02-19 17:50:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:14,952 INFO L225 Difference]: With dead ends: 452 [2021-02-19 17:50:14,952 INFO L226 Difference]: Without dead ends: 437 [2021-02-19 17:50:14,952 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-02-19 17:50:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 332. [2021-02-19 17:50:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2021-02-19 17:50:14,956 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 20 [2021-02-19 17:50:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:14,956 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2021-02-19 17:50:14,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2021-02-19 17:50:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:14,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:14,957 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:15,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2137 [2021-02-19 17:50:15,157 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1211937941, now seen corresponding path program 170 times [2021-02-19 17:50:15,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:15,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986460828] [2021-02-19 17:50:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:15,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986460828] [2021-02-19 17:50:15,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463975979] [2021-02-19 17:50:15,494 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:15,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:15,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:15,597 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 19 treesize of output 15 [2021-02-19 17:50:15,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:15,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:15,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:15,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-02-19 17:50:15,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:15,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:15,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:15,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:15,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:15,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:15,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:15,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:15,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:15 [2021-02-19 17:50:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:15,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:15,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:15,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405689882] [2021-02-19 17:50:15,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:15,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:15,945 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:17,110 INFO L93 Difference]: Finished difference Result 461 states and 1356 transitions. [2021-02-19 17:50:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:17,112 INFO L225 Difference]: With dead ends: 461 [2021-02-19 17:50:17,112 INFO L226 Difference]: Without dead ends: 446 [2021-02-19 17:50:17,112 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-02-19 17:50:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 329. [2021-02-19 17:50:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:50:17,116 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:50:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:17,116 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:50:17,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:50:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:17,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:17,117 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:17,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-02-19 17:50:17,327 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash -125629273, now seen corresponding path program 171 times [2021-02-19 17:50:17,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:17,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948547650] [2021-02-19 17:50:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948547650] [2021-02-19 17:50:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957461449] [2021-02-19 17:50:17,640 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:17,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:17,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:17,823 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 19 treesize of output 15 [2021-02-19 17:50:17,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:17,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:50:17,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-02-19 17:50:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,927 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 20 treesize of output 16 [2021-02-19 17:50:17,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:50:17,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,043 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 12 treesize of output 5 [2021-02-19 17:50:18,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,053 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 12 treesize of output 5 [2021-02-19 17:50:18,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:18,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:89, output treesize:41 [2021-02-19 17:50:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:18,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:18,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:50:18,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840677389] [2021-02-19 17:50:18,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:50:18,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:50:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:18,537 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:19,198 INFO L93 Difference]: Finished difference Result 395 states and 1165 transitions. [2021-02-19 17:50:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 20 [2021-02-19 17:50:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:19,201 INFO L225 Difference]: With dead ends: 395 [2021-02-19 17:50:19,201 INFO L226 Difference]: Without dead ends: 380 [2021-02-19 17:50:19,202 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-02-19 17:50:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 325. [2021-02-19 17:50:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:50:19,206 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:50:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:19,206 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:50:19,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2021-02-19 17:50:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:50:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:19,206 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:19,206 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2150,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:19,424 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1454472395, now seen corresponding path program 172 times [2021-02-19 17:50:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651504592] [2021-02-19 17:50:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651504592] [2021-02-19 17:50:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209399666] [2021-02-19 17:50:19,783 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:19,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:19,948 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 19 treesize of output 15 [2021-02-19 17:50:19,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:19,958 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 19 treesize of output 15 [2021-02-19 17:50:19,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:20,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:20,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:20,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:20,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:20,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:50:20,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:20,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:20,403 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:20,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:20,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-02-19 17:50:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:20,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:20,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951233639] [2021-02-19 17:50:20,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:20,573 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:21,580 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 17:50:21,932 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:50:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:22,122 INFO L93 Difference]: Finished difference Result 520 states and 1541 transitions. [2021-02-19 17:50:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:22,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:22,126 INFO L225 Difference]: With dead ends: 520 [2021-02-19 17:50:22,126 INFO L226 Difference]: Without dead ends: 505 [2021-02-19 17:50:22,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-02-19 17:50:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 342. [2021-02-19 17:50:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.997067448680352) internal successors, (1022), 341 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1022 transitions. [2021-02-19 17:50:22,131 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1022 transitions. Word has length 20 [2021-02-19 17:50:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:22,131 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1022 transitions. [2021-02-19 17:50:22,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1022 transitions. [2021-02-19 17:50:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:22,132 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:22,132 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:22,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-02-19 17:50:22,332 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash -345322773, now seen corresponding path program 173 times [2021-02-19 17:50:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:22,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526072889] [2021-02-19 17:50:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526072889] [2021-02-19 17:50:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68051819] [2021-02-19 17:50:22,498 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:22,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:22,651 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 19 treesize of output 15 [2021-02-19 17:50:22,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:22,660 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 19 treesize of output 15 [2021-02-19 17:50:22,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:22,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:22,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:22,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:22,949 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 30 treesize of output 24 [2021-02-19 17:50:22,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:22,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:23,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:23,007 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:23,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:23,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:50:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:23,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:23,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:23,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413025308] [2021-02-19 17:50:23,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:23,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:23,295 INFO L87 Difference]: Start difference. First operand 342 states and 1022 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:23,592 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:50:24,466 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 17:50:24,843 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:50:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:24,962 INFO L93 Difference]: Finished difference Result 526 states and 1554 transitions. [2021-02-19 17:50:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:24,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:24,963 INFO L225 Difference]: With dead ends: 526 [2021-02-19 17:50:24,963 INFO L226 Difference]: Without dead ends: 511 [2021-02-19 17:50:24,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-02-19 17:50:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 340. [2021-02-19 17:50:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.994100294985251) internal successors, (1015), 339 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1015 transitions. [2021-02-19 17:50:24,968 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1015 transitions. Word has length 20 [2021-02-19 17:50:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:24,968 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1015 transitions. [2021-02-19 17:50:24,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1015 transitions. [2021-02-19 17:50:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:24,968 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:24,968 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:25,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:25,169 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash 481262197, now seen corresponding path program 174 times [2021-02-19 17:50:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162006304] [2021-02-19 17:50:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162006304] [2021-02-19 17:50:25,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353673228] [2021-02-19 17:50:25,525 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:25,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:50:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:25,660 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 19 treesize of output 15 [2021-02-19 17:50:25,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:25,669 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 19 treesize of output 15 [2021-02-19 17:50:25,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:25,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:25,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:25,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:26,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:26,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:26,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:26,098 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:26,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:26,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:26,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:26,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-02-19 17:50:26,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:26,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:65, output treesize:35 [2021-02-19 17:50:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:26,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:26,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:26,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259608168] [2021-02-19 17:50:26,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:26,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:26,306 INFO L87 Difference]: Start difference. First operand 340 states and 1015 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:26,943 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 17:50:27,573 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 17:50:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:27,971 INFO L93 Difference]: Finished difference Result 541 states and 1606 transitions. [2021-02-19 17:50:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:27,974 INFO L225 Difference]: With dead ends: 541 [2021-02-19 17:50:27,974 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:50:27,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:50:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 337. [2021-02-19 17:50:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2021-02-19 17:50:27,984 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 20 [2021-02-19 17:50:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:27,984 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2021-02-19 17:50:27,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2021-02-19 17:50:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:27,984 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:27,984 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:28,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2173,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:28,185 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash -372866039, now seen corresponding path program 175 times [2021-02-19 17:50:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:28,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920678809] [2021-02-19 17:50:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920678809] [2021-02-19 17:50:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019137206] [2021-02-19 17:50:28,532 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:28,682 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 19 treesize of output 15 [2021-02-19 17:50:28,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:28,691 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 19 treesize of output 15 [2021-02-19 17:50:28,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:28,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:28,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:28,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:28,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:28,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:28,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:28,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:28,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:28,939 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:28,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_361 vanished before elimination [2021-02-19 17:50:28,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:28,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:50:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:29,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:29,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:29,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872525079] [2021-02-19 17:50:29,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:29,243 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:29,679 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:50:30,222 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 17:50:30,526 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:50:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:30,603 INFO L93 Difference]: Finished difference Result 541 states and 1601 transitions. [2021-02-19 17:50:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:30,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:30,605 INFO L225 Difference]: With dead ends: 541 [2021-02-19 17:50:30,605 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:50:30,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:50:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:50:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 336. [2021-02-19 17:50:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.982089552238806) internal successors, (999), 335 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 999 transitions. [2021-02-19 17:50:30,609 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 999 transitions. Word has length 20 [2021-02-19 17:50:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:30,610 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 999 transitions. [2021-02-19 17:50:30,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 999 transitions. [2021-02-19 17:50:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:30,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:30,610 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:30,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2182 [2021-02-19 17:50:30,826 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1522010091, now seen corresponding path program 176 times [2021-02-19 17:50:30,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:30,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273445070] [2021-02-19 17:50:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273445070] [2021-02-19 17:50:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496896050] [2021-02-19 17:50:31,151 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:31,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:31,358 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 19 treesize of output 15 [2021-02-19 17:50:31,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:31,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:50:31,443 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 20 treesize of output 16 [2021-02-19 17:50:31,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,459 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 20 treesize of output 16 [2021-02-19 17:50:31,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:31,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:31,524 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:31,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:31,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:50:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:31,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:31,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:31,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981687461] [2021-02-19 17:50:31,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:31,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:31,845 INFO L87 Difference]: Start difference. First operand 336 states and 999 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:33,040 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:50:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:33,231 INFO L93 Difference]: Finished difference Result 498 states and 1484 transitions. [2021-02-19 17:50:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:50:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:33,234 INFO L225 Difference]: With dead ends: 498 [2021-02-19 17:50:33,235 INFO L226 Difference]: Without dead ends: 483 [2021-02-19 17:50:33,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-02-19 17:50:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2021-02-19 17:50:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9849397590361444) internal successors, (991), 332 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 991 transitions. [2021-02-19 17:50:33,239 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 991 transitions. Word has length 20 [2021-02-19 17:50:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:33,239 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 991 transitions. [2021-02-19 17:50:33,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 991 transitions. [2021-02-19 17:50:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:33,240 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:33,240 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:33,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2189 [2021-02-19 17:50:33,440 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1317076865, now seen corresponding path program 177 times [2021-02-19 17:50:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:33,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921047576] [2021-02-19 17:50:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921047576] [2021-02-19 17:50:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691185863] [2021-02-19 17:50:33,793 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:50:33,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:50:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:33,943 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 19 treesize of output 15 [2021-02-19 17:50:33,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:33,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:33,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:33,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:50:34,029 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 20 treesize of output 16 [2021-02-19 17:50:34,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:34,038 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 20 treesize of output 16 [2021-02-19 17:50:34,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:34,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:34,106 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:34,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:34,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:50:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:34,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:34,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808244582] [2021-02-19 17:50:34,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:34,291 INFO L87 Difference]: Start difference. First operand 333 states and 991 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:35,148 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:50:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:35,321 INFO L93 Difference]: Finished difference Result 456 states and 1338 transitions. [2021-02-19 17:50:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:35,324 INFO L225 Difference]: With dead ends: 456 [2021-02-19 17:50:35,324 INFO L226 Difference]: Without dead ends: 441 [2021-02-19 17:50:35,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:50:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-02-19 17:50:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 332. [2021-02-19 17:50:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9818731117824773) internal successors, (987), 331 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 987 transitions. [2021-02-19 17:50:35,333 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 987 transitions. Word has length 20 [2021-02-19 17:50:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:35,333 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 987 transitions. [2021-02-19 17:50:35,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 987 transitions. [2021-02-19 17:50:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:35,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:35,334 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:35,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2193 [2021-02-19 17:50:35,535 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash -883588683, now seen corresponding path program 178 times [2021-02-19 17:50:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:35,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186462517] [2021-02-19 17:50:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186462517] [2021-02-19 17:50:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349083604] [2021-02-19 17:50:35,813 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:35,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:35,927 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 19 treesize of output 15 [2021-02-19 17:50:35,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:35,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:35,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:35,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 17:50:35,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:50:36,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:36,007 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 20 treesize of output 16 [2021-02-19 17:50:36,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:36,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:36,079 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:36,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:36,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:35 [2021-02-19 17:50:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:36,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:36,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:50:36,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946194909] [2021-02-19 17:50:36,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:50:36,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:50:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:50:36,270 INFO L87 Difference]: Start difference. First operand 332 states and 987 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:37,143 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-02-19 17:50:37,433 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:50:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:37,571 INFO L93 Difference]: Finished difference Result 600 states and 1778 transitions. [2021-02-19 17:50:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:50:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:37,575 INFO L225 Difference]: With dead ends: 600 [2021-02-19 17:50:37,575 INFO L226 Difference]: Without dead ends: 585 [2021-02-19 17:50:37,575 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-02-19 17:50:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 327. [2021-02-19 17:50:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9877300613496933) internal successors, (974), 326 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 974 transitions. [2021-02-19 17:50:37,580 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 974 transitions. Word has length 20 [2021-02-19 17:50:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:37,580 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 974 transitions. [2021-02-19 17:50:37,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 974 transitions. [2021-02-19 17:50:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:37,580 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:37,580 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:37,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:37,794 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1953543719, now seen corresponding path program 179 times [2021-02-19 17:50:37,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:37,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470860181] [2021-02-19 17:50:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:38,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470860181] [2021-02-19 17:50:38,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84574805] [2021-02-19 17:50:38,113 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:38,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:38,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:38,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:38,206 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 19 treesize of output 15 [2021-02-19 17:50:38,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:38,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:38,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:38,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:50:38,288 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 20 treesize of output 16 [2021-02-19 17:50:38,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:38,296 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 20 treesize of output 16 [2021-02-19 17:50:38,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:38,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:38,373 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:38,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:38,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:50:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:38,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:38,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850620105] [2021-02-19 17:50:38,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:38,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:38,694 INFO L87 Difference]: Start difference. First operand 327 states and 974 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:50:39,701 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:50:40,079 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 17:50:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:40,255 INFO L93 Difference]: Finished difference Result 642 states and 1887 transitions. [2021-02-19 17:50:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 20 [2021-02-19 17:50:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:40,259 INFO L225 Difference]: With dead ends: 642 [2021-02-19 17:50:40,259 INFO L226 Difference]: Without dead ends: 627 [2021-02-19 17:50:40,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-02-19 17:50:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 325. [2021-02-19 17:50:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9814814814814814) internal successors, (966), 324 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 966 transitions. [2021-02-19 17:50:40,264 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 966 transitions. Word has length 20 [2021-02-19 17:50:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:40,264 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 966 transitions. [2021-02-19 17:50:40,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:50:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 966 transitions. [2021-02-19 17:50:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:40,265 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:40,265 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:40,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2202,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:40,467 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash 471905873, now seen corresponding path program 180 times [2021-02-19 17:50:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:40,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780621891] [2021-02-19 17:50:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780621891] [2021-02-19 17:50:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173672340] [2021-02-19 17:50:40,793 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:40,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:40,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:40,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:40,871 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 19 treesize of output 15 [2021-02-19 17:50:40,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:40,875 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 19 treesize of output 15 [2021-02-19 17:50:40,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:40,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:40,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:40,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:41,145 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 30 treesize of output 24 [2021-02-19 17:50:41,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:41,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:41,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:41,193 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:41,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:41,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:50:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:41,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:41,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610883596] [2021-02-19 17:50:41,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:41,547 INFO L87 Difference]: Start difference. First operand 325 states and 966 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:42,115 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 17:50:42,939 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:50:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:43,189 INFO L93 Difference]: Finished difference Result 492 states and 1457 transitions. [2021-02-19 17:50:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:50:43,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:43,192 INFO L225 Difference]: With dead ends: 492 [2021-02-19 17:50:43,192 INFO L226 Difference]: Without dead ends: 477 [2021-02-19 17:50:43,192 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:50:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-02-19 17:50:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 337. [2021-02-19 17:50:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-02-19 17:50:43,196 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 20 [2021-02-19 17:50:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:43,196 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-02-19 17:50:43,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-02-19 17:50:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:43,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:43,197 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:43,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2207,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:43,399 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash -532426065, now seen corresponding path program 181 times [2021-02-19 17:50:43,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:43,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401492749] [2021-02-19 17:50:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:43,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401492749] [2021-02-19 17:50:43,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309054482] [2021-02-19 17:50:43,672 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:43,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:43,812 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 19 treesize of output 15 [2021-02-19 17:50:43,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,820 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 19 treesize of output 15 [2021-02-19 17:50:43,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:43,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:43,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:44,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:44,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:44,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:44,095 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:44,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:44,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:44,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:44,166 INFO L518 ElimStorePlain]: Eliminatee v_prenex_363 vanished before elimination [2021-02-19 17:50:44,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:44,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:50:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:44,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:44,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:44,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107298526] [2021-02-19 17:50:44,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:44,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:44,473 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:44,840 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:50:45,203 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 17:50:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:45,360 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-02-19 17:50:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:45,363 INFO L225 Difference]: With dead ends: 429 [2021-02-19 17:50:45,363 INFO L226 Difference]: Without dead ends: 414 [2021-02-19 17:50:45,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:50:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-02-19 17:50:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 334. [2021-02-19 17:50:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-02-19 17:50:45,367 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 20 [2021-02-19 17:50:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:45,367 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-02-19 17:50:45,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-02-19 17:50:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:45,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:45,367 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:45,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:45,568 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1869993279, now seen corresponding path program 182 times [2021-02-19 17:50:45,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:45,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279928493] [2021-02-19 17:50:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:45,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279928493] [2021-02-19 17:50:45,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114436918] [2021-02-19 17:50:45,874 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:45,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:50:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:46,007 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 19 treesize of output 15 [2021-02-19 17:50:46,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:46,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:46,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:46,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:50:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:50:46,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:46,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:46,102 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:46,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:46,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-02-19 17:50:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517036638] [2021-02-19 17:50:46,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:46,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:46,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:46,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:46,309 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:47,056 INFO L93 Difference]: Finished difference Result 476 states and 1406 transitions. [2021-02-19 17:50:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:47,058 INFO L225 Difference]: With dead ends: 476 [2021-02-19 17:50:47,058 INFO L226 Difference]: Without dead ends: 461 [2021-02-19 17:50:47,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:50:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-02-19 17:50:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 331. [2021-02-19 17:50:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.981818181818182) internal successors, (984), 330 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 984 transitions. [2021-02-19 17:50:47,062 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 984 transitions. Word has length 20 [2021-02-19 17:50:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:47,062 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 984 transitions. [2021-02-19 17:50:47,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 984 transitions. [2021-02-19 17:50:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:47,062 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:47,062 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:47,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-02-19 17:50:47,263 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash -597059571, now seen corresponding path program 183 times [2021-02-19 17:50:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823014112] [2021-02-19 17:50:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:47,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823014112] [2021-02-19 17:50:47,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846113503] [2021-02-19 17:50:47,580 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:47,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:50:47,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:47,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:47,664 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 19 treesize of output 15 [2021-02-19 17:50:47,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:47,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:50:47,742 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 20 treesize of output 16 [2021-02-19 17:50:47,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,750 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 20 treesize of output 16 [2021-02-19 17:50:47,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:47,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:47,818 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:47,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:47,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:50:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:48,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:48,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:50:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982827006] [2021-02-19 17:50:48,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:48,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:48,194 INFO L87 Difference]: Start difference. First operand 331 states and 984 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:50:49,393 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 17:50:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:49,528 INFO L93 Difference]: Finished difference Result 591 states and 1751 transitions. [2021-02-19 17:50:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 20 [2021-02-19 17:50:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:49,531 INFO L225 Difference]: With dead ends: 591 [2021-02-19 17:50:49,531 INFO L226 Difference]: Without dead ends: 576 [2021-02-19 17:50:49,531 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-02-19 17:50:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 323. [2021-02-19 17:50:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-02-19 17:50:49,535 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 20 [2021-02-19 17:50:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:49,535 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-02-19 17:50:49,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:50:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-02-19 17:50:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:49,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:49,536 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:49,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2226 [2021-02-19 17:50:49,736 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash 63639971, now seen corresponding path program 184 times [2021-02-19 17:50:49,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:49,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958275005] [2021-02-19 17:50:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:49,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958275005] [2021-02-19 17:50:49,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830061821] [2021-02-19 17:50:49,996 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:50,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:50,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:50,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,075 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 19 treesize of output 15 [2021-02-19 17:50:50,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:50,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:50,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:50:50,406 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 30 treesize of output 24 [2021-02-19 17:50:50,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:50,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:50,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:50,462 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:50,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:50,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:50:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:50,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:50,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:50,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033044221] [2021-02-19 17:50:50,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:50,626 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:51,517 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:50:52,062 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:50:52,229 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 17:50:52,748 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 17:50:52,957 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:50:53,267 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 17:50:53,546 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 17:50:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:53,717 INFO L93 Difference]: Finished difference Result 765 states and 2269 transitions. [2021-02-19 17:50:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:50:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:53,721 INFO L225 Difference]: With dead ends: 765 [2021-02-19 17:50:53,721 INFO L226 Difference]: Without dead ends: 735 [2021-02-19 17:50:53,721 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:50:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-02-19 17:50:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 335. [2021-02-19 17:50:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-02-19 17:50:53,727 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-02-19 17:50:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:53,727 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-02-19 17:50:53,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-02-19 17:50:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:53,727 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:53,727 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:53,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2231,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:53,928 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:53,928 INFO L82 PathProgramCache]: Analyzing trace with hash -150507033, now seen corresponding path program 185 times [2021-02-19 17:50:53,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:53,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320090966] [2021-02-19 17:50:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:54,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320090966] [2021-02-19 17:50:54,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803736915] [2021-02-19 17:50:54,177 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:54,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:50:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:54,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:54,265 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 19 treesize of output 15 [2021-02-19 17:50:54,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:54,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:50:54,304 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 20 treesize of output 16 [2021-02-19 17:50:54,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,309 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 20 treesize of output 16 [2021-02-19 17:50:54,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:54,343 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:50:54,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:54,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:50:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:54,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:54,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470956811] [2021-02-19 17:50:54,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:54,650 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:55,405 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:50:55,713 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 17:50:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:55,901 INFO L93 Difference]: Finished difference Result 527 states and 1548 transitions. [2021-02-19 17:50:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:55,905 INFO L225 Difference]: With dead ends: 527 [2021-02-19 17:50:55,905 INFO L226 Difference]: Without dead ends: 512 [2021-02-19 17:50:55,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:50:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-02-19 17:50:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2021-02-19 17:50:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:50:55,909 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:50:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:55,909 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:50:55,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:50:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:55,910 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:55,910 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:56,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2241,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:56,110 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1028589465, now seen corresponding path program 186 times [2021-02-19 17:50:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:56,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399826201] [2021-02-19 17:50:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399826201] [2021-02-19 17:50:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529114386] [2021-02-19 17:50:56,410 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:56,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:50:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:56,581 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 19 treesize of output 15 [2021-02-19 17:50:56,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,589 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 19 treesize of output 15 [2021-02-19 17:50:56,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:56,665 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:50:56,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:56,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,942 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:56,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:56,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:33 [2021-02-19 17:50:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:57,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:57,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:50:57,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655155346] [2021-02-19 17:50:57,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:50:57,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:57,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:50:57,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:50:57,250 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:58,171 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:50:58,658 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:50:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:59,068 INFO L93 Difference]: Finished difference Result 595 states and 1754 transitions. [2021-02-19 17:50:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:50:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:50:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:59,071 INFO L225 Difference]: With dead ends: 595 [2021-02-19 17:50:59,071 INFO L226 Difference]: Without dead ends: 580 [2021-02-19 17:50:59,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:50:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-02-19 17:50:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 341. [2021-02-19 17:50:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9911764705882353) internal successors, (1017), 340 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1017 transitions. [2021-02-19 17:50:59,076 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1017 transitions. Word has length 20 [2021-02-19 17:50:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:59,076 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1017 transitions. [2021-02-19 17:50:59,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1017 transitions. [2021-02-19 17:50:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:50:59,077 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:59,077 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:59,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2246,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:59,277 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2032921403, now seen corresponding path program 187 times [2021-02-19 17:50:59,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:59,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412858351] [2021-02-19 17:50:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:59,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412858351] [2021-02-19 17:50:59,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029370394] [2021-02-19 17:50:59,441 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:50:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:59,584 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 19 treesize of output 15 [2021-02-19 17:50:59,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:59,590 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 19 treesize of output 15 [2021-02-19 17:50:59,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:59,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:59,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-02-19 17:50:59,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:59,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:59,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:59,869 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:50:59,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:50:59,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:59,935 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-02-19 17:50:59,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:50:59,937 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:41 [2021-02-19 17:51:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:00,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:00,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:00,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155048843] [2021-02-19 17:51:00,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:00,333 INFO L87 Difference]: Start difference. First operand 341 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:00,853 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:51:01,137 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 17:51:01,402 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 17:51:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:01,543 INFO L93 Difference]: Finished difference Result 521 states and 1527 transitions. [2021-02-19 17:51:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:51:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:01,547 INFO L225 Difference]: With dead ends: 521 [2021-02-19 17:51:01,547 INFO L226 Difference]: Without dead ends: 506 [2021-02-19 17:51:01,547 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:51:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-02-19 17:51:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 338. [2021-02-19 17:51:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9821958456973294) internal successors, (1005), 337 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1005 transitions. [2021-02-19 17:51:01,551 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1005 transitions. Word has length 20 [2021-02-19 17:51:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:01,551 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1005 transitions. [2021-02-19 17:51:01,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1005 transitions. [2021-02-19 17:51:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:51:01,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:01,552 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:01,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2256 [2021-02-19 17:51:01,752 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 924478679, now seen corresponding path program 188 times [2021-02-19 17:51:01,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:01,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357972558] [2021-02-19 17:51:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:02,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357972558] [2021-02-19 17:51:02,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179549876] [2021-02-19 17:51:02,055 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:02,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:02,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:02,201 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 19 treesize of output 15 [2021-02-19 17:51:02,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:02,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-02-19 17:51:02,281 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 20 treesize of output 16 [2021-02-19 17:51:02,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:02,300 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:02,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:02,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:15 [2021-02-19 17:51:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:02,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:02,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:51:02,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760627819] [2021-02-19 17:51:02,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:51:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:51:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:02,523 INFO L87 Difference]: Start difference. First operand 338 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:03,795 INFO L93 Difference]: Finished difference Result 583 states and 1715 transitions. [2021-02-19 17:51:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:51:03,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 20 [2021-02-19 17:51:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:03,799 INFO L225 Difference]: With dead ends: 583 [2021-02-19 17:51:03,799 INFO L226 Difference]: Without dead ends: 568 [2021-02-19 17:51:03,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:51:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-02-19 17:51:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 335. [2021-02-19 17:51:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9820359281437128) internal successors, (996), 334 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 996 transitions. [2021-02-19 17:51:03,803 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 996 transitions. Word has length 20 [2021-02-19 17:51:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:03,803 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 996 transitions. [2021-02-19 17:51:03,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 996 transitions. [2021-02-19 17:51:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:51:03,803 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:03,804 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:04,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:04,004 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2097554909, now seen corresponding path program 189 times [2021-02-19 17:51:04,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:04,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564016318] [2021-02-19 17:51:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:04,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564016318] [2021-02-19 17:51:04,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294030243] [2021-02-19 17:51:04,147 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:51:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:51:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:04,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:04,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:04,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:04,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:17 [2021-02-19 17:51:04,294 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 20 treesize of output 16 [2021-02-19 17:51:04,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:04,302 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 20 treesize of output 16 [2021-02-19 17:51:04,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:04,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:04,371 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:04,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:04,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:41 [2021-02-19 17:51:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:04,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:04,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:51:04,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520986969] [2021-02-19 17:51:04,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:51:04,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:51:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:51:04,753 INFO L87 Difference]: Start difference. First operand 335 states and 996 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:51:06,190 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 17:51:06,569 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 17:51:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:06,660 INFO L93 Difference]: Finished difference Result 698 states and 2060 transitions. [2021-02-19 17:51:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:51:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 20 [2021-02-19 17:51:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:06,662 INFO L225 Difference]: With dead ends: 698 [2021-02-19 17:51:06,662 INFO L226 Difference]: Without dead ends: 683 [2021-02-19 17:51:06,662 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:51:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-19 17:51:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 329. [2021-02-19 17:51:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-02-19 17:51:06,666 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 20 [2021-02-19 17:51:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-02-19 17:51:06,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2021-02-19 17:51:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-02-19 17:51:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:06,667 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:06,667 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:06,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:06,867 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash -910293966, now seen corresponding path program 190 times [2021-02-19 17:51:06,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:06,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881679525] [2021-02-19 17:51:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:07,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881679525] [2021-02-19 17:51:07,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154491871] [2021-02-19 17:51:07,126 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:07,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:07,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:51:07,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:07,310 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 17 treesize of output 13 [2021-02-19 17:51:07,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:07,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-02-19 17:51:07,393 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 19 treesize of output 15 [2021-02-19 17:51:07,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:07,407 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:07,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:51:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:07,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:07,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:51:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227712009] [2021-02-19 17:51:07,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:51:07,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:51:07,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:51:07,450 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:07,900 INFO L93 Difference]: Finished difference Result 498 states and 1467 transitions. [2021-02-19 17:51:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:07,901 INFO L225 Difference]: With dead ends: 498 [2021-02-19 17:51:07,901 INFO L226 Difference]: Without dead ends: 476 [2021-02-19 17:51:07,901 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:51:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-02-19 17:51:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 343. [2021-02-19 17:51:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.017543859649123) internal successors, (1032), 342 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1032 transitions. [2021-02-19 17:51:07,905 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1032 transitions. Word has length 21 [2021-02-19 17:51:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1032 transitions. [2021-02-19 17:51:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1032 transitions. [2021-02-19 17:51:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:07,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:07,906 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:08,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2269 [2021-02-19 17:51:08,106 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2084498794, now seen corresponding path program 191 times [2021-02-19 17:51:08,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:08,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18614793] [2021-02-19 17:51:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:08,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18614793] [2021-02-19 17:51:08,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917853585] [2021-02-19 17:51:08,370 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:08,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:08,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:51:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:08,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:08,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2021-02-19 17:51:08,650 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 19 treesize of output 15 [2021-02-19 17:51:08,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:08,663 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:08,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:51:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:08,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:08,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:51:08,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349868859] [2021-02-19 17:51:08,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:51:08,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:08,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:51:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:51:08,708 INFO L87 Difference]: Start difference. First operand 343 states and 1032 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:09,194 INFO L93 Difference]: Finished difference Result 446 states and 1332 transitions. [2021-02-19 17:51:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:09,197 INFO L225 Difference]: With dead ends: 446 [2021-02-19 17:51:09,197 INFO L226 Difference]: Without dead ends: 424 [2021-02-19 17:51:09,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:51:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-02-19 17:51:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-02-19 17:51:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0258620689655173) internal successors, (1053), 348 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1053 transitions. [2021-02-19 17:51:09,201 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1053 transitions. Word has length 21 [2021-02-19 17:51:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:09,201 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1053 transitions. [2021-02-19 17:51:09,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1053 transitions. [2021-02-19 17:51:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:09,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:09,202 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:09,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2271,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:09,402 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -975349172, now seen corresponding path program 192 times [2021-02-19 17:51:09,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:09,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604883242] [2021-02-19 17:51:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:09,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604883242] [2021-02-19 17:51:09,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574946995] [2021-02-19 17:51:09,537 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:09,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:51:09,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:09,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:09,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:09,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,682 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 17 treesize of output 13 [2021-02-19 17:51:09,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:09,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:09,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:51:09,864 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 19 treesize of output 15 [2021-02-19 17:51:09,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:09,937 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:09,942 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 19 treesize of output 15 [2021-02-19 17:51:09,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:10,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:10,003 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-02-19 17:51:10,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:10,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:61, output treesize:35 [2021-02-19 17:51:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:10,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:51:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623966468] [2021-02-19 17:51:10,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:51:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:51:10,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:51:10,290 INFO L87 Difference]: Start difference. First operand 349 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:10,985 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:51:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:11,088 INFO L93 Difference]: Finished difference Result 455 states and 1356 transitions. [2021-02-19 17:51:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:51:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 21 [2021-02-19 17:51:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:11,091 INFO L225 Difference]: With dead ends: 455 [2021-02-19 17:51:11,091 INFO L226 Difference]: Without dead ends: 433 [2021-02-19 17:51:11,091 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:51:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-02-19 17:51:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 346. [2021-02-19 17:51:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.017391304347826) internal successors, (1041), 345 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1041 transitions. [2021-02-19 17:51:11,095 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1041 transitions. Word has length 21 [2021-02-19 17:51:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:11,095 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 1041 transitions. [2021-02-19 17:51:11,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1041 transitions. [2021-02-19 17:51:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:11,096 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:11,096 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:11,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:11,296 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1481695438, now seen corresponding path program 193 times [2021-02-19 17:51:11,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:11,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334135670] [2021-02-19 17:51:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:11,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334135670] [2021-02-19 17:51:11,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475168557] [2021-02-19 17:51:11,560 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:51:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:11,733 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 17 treesize of output 13 [2021-02-19 17:51:11,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:11,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:11,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:11,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-02-19 17:51:11,799 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 19 treesize of output 15 [2021-02-19 17:51:11,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:11,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:11,815 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:11,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:11,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-02-19 17:51:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:11,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:11,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:51:11,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130786662] [2021-02-19 17:51:11,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:51:11,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:11,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:51:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:51:11,878 INFO L87 Difference]: Start difference. First operand 346 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:12,225 INFO L93 Difference]: Finished difference Result 443 states and 1323 transitions. [2021-02-19 17:51:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:12,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:12,226 INFO L225 Difference]: With dead ends: 443 [2021-02-19 17:51:12,226 INFO L226 Difference]: Without dead ends: 421 [2021-02-19 17:51:12,227 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:51:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-02-19 17:51:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 345. [2021-02-19 17:51:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0319767441860463) internal successors, (1043), 344 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1043 transitions. [2021-02-19 17:51:12,230 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1043 transitions. Word has length 21 [2021-02-19 17:51:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:12,230 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1043 transitions. [2021-02-19 17:51:12,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1043 transitions. [2021-02-19 17:51:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:12,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:12,231 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:12,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:12,431 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1633974606, now seen corresponding path program 194 times [2021-02-19 17:51:12,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:12,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649018030] [2021-02-19 17:51:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649018030] [2021-02-19 17:51:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463784230] [2021-02-19 17:51:12,729 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:12,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,010 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 26 treesize of output 20 [2021-02-19 17:51:13,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:13,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,024 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 26 treesize of output 20 [2021-02-19 17:51:13,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:13,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,037 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 19 treesize of output 15 [2021-02-19 17:51:13,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:13,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:13,048 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 19 treesize of output 15 [2021-02-19 17:51:13,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:13,204 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 17:51:13,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:13,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:51:13,211 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:169, output treesize:145 [2021-02-19 17:51:14,053 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_390, v_prenex_380, v_prenex_393, v_prenex_382, o_4, v_prenex_383, v_prenex_384, v_prenex_385, v_prenex_386, v_prenex_387, v_prenex_388, v_prenex_378], 1=[o_2, v_prenex_381, v_prenex_377, v_prenex_379]} [2021-02-19 17:51:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:51:14,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,492 WARN L202 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2021-02-19 17:51:14,494 INFO L628 ElimStorePlain]: treesize reduction 62, result has 79.6 percent of original size [2021-02-19 17:51:14,502 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 28 treesize of output 22 [2021-02-19 17:51:14,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,715 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-02-19 17:51:14,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:14,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_393 vanished before elimination [2021-02-19 17:51:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:14,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,122 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-02-19 17:51:15,123 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.2 percent of original size [2021-02-19 17:51:15,123 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:15,131 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 39 treesize of output 31 [2021-02-19 17:51:15,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,306 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:51:15,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_384 vanished before elimination [2021-02-19 17:51:15,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:15,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-02-19 17:51:15,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:15,402 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_388 vanished before elimination [2021-02-19 17:51:15,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:51:15,484 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,609 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 17:51:15,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,610 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-02-19 17:51:15,610 INFO L518 ElimStorePlain]: Eliminatee v_prenex_381 vanished before elimination [2021-02-19 17:51:15,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:15,621 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,757 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:51:15,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:15,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:15,769 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:15,916 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:51:15,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:15,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:51:15,926 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:315, output treesize:47 [2021-02-19 17:51:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:16,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:16,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:16,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827989324] [2021-02-19 17:51:16,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:16,128 INFO L87 Difference]: Start difference. First operand 345 states and 1043 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:16,709 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:17,386 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-02-19 17:51:17,671 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-02-19 17:51:18,366 WARN L202 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-02-19 17:51:18,937 WARN L202 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-02-19 17:51:19,604 WARN L202 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-02-19 17:51:20,135 WARN L202 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-02-19 17:51:20,373 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:51:20,942 WARN L202 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-02-19 17:51:21,378 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-02-19 17:51:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:21,513 INFO L93 Difference]: Finished difference Result 747 states and 2222 transitions. [2021-02-19 17:51:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:51:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:21,517 INFO L225 Difference]: With dead ends: 747 [2021-02-19 17:51:21,517 INFO L226 Difference]: Without dead ends: 675 [2021-02-19 17:51:21,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:51:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-02-19 17:51:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 347. [2021-02-19 17:51:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0289017341040463) internal successors, (1048), 346 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1048 transitions. [2021-02-19 17:51:21,522 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1048 transitions. Word has length 21 [2021-02-19 17:51:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:21,522 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1048 transitions. [2021-02-19 17:51:21,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1048 transitions. [2021-02-19 17:51:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:21,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:21,522 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:21,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2282 [2021-02-19 17:51:21,723 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1562641015, now seen corresponding path program 195 times [2021-02-19 17:51:21,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:21,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303090779] [2021-02-19 17:51:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303090779] [2021-02-19 17:51:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921782454] [2021-02-19 17:51:22,020 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:22,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:51:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:22,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:22,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:22,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:22,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:22,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:22,393 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 17 treesize of output 13 [2021-02-19 17:51:22,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:22,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:22,406 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 24 treesize of output 18 [2021-02-19 17:51:22,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:22,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:22,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:22,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:22,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-02-19 17:51:22,467 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-02-19 17:51:22,892 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_397], 1=[o_2, v_prenex_396]} [2021-02-19 17:51:22,898 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 19 treesize of output 15 [2021-02-19 17:51:22,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:22,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:22,966 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 26 treesize of output 20 [2021-02-19 17:51:22,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:23,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:23,032 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 [2021-02-19 17:51:23,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:23,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:23,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:23,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:23,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:23,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:21 [2021-02-19 17:51:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:23,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:23,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:23,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168281278] [2021-02-19 17:51:23,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:23,201 INFO L87 Difference]: Start difference. First operand 347 states and 1048 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:23,624 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:51:24,071 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:51:24,915 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:51:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:26,021 INFO L93 Difference]: Finished difference Result 811 states and 2425 transitions. [2021-02-19 17:51:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:51:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:26,023 INFO L225 Difference]: With dead ends: 811 [2021-02-19 17:51:26,023 INFO L226 Difference]: Without dead ends: 792 [2021-02-19 17:51:26,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:51:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-02-19 17:51:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 353. [2021-02-19 17:51:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.03125) internal successors, (1067), 352 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1067 transitions. [2021-02-19 17:51:26,028 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1067 transitions. Word has length 21 [2021-02-19 17:51:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:26,028 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1067 transitions. [2021-02-19 17:51:26,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1067 transitions. [2021-02-19 17:51:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:26,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:26,029 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:26,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2302 [2021-02-19 17:51:26,231 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1558121453, now seen corresponding path program 196 times [2021-02-19 17:51:26,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:26,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378089985] [2021-02-19 17:51:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:26,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378089985] [2021-02-19 17:51:26,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165247847] [2021-02-19 17:51:26,531 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:26,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:26,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:26,884 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 24 treesize of output 18 [2021-02-19 17:51:26,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:26,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:26,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:26,897 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 17 treesize of output 13 [2021-02-19 17:51:26,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:26,906 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 17 treesize of output 13 [2021-02-19 17:51:26,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:26,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:26,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:26,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:26,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-02-19 17:51:26,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-02-19 17:51:27,421 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_400], 1=[o_2, v_prenex_399]} [2021-02-19 17:51:27,427 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 19 treesize of output 15 [2021-02-19 17:51:27,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:27,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:27,495 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 26 treesize of output 20 [2021-02-19 17:51:27,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:27,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:27,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:27,560 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 [2021-02-19 17:51:27,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:27,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:27,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:27,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:27,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:27,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:27,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:21 [2021-02-19 17:51:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:27,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:27,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692357178] [2021-02-19 17:51:27,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:27,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:27,853 INFO L87 Difference]: Start difference. First operand 353 states and 1067 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:28,956 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:30,238 INFO L93 Difference]: Finished difference Result 769 states and 2317 transitions. [2021-02-19 17:51:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:51:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:30,241 INFO L225 Difference]: With dead ends: 769 [2021-02-19 17:51:30,241 INFO L226 Difference]: Without dead ends: 750 [2021-02-19 17:51:30,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:51:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-02-19 17:51:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 355. [2021-02-19 17:51:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0282485875706215) internal successors, (1072), 354 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2021-02-19 17:51:30,246 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 21 [2021-02-19 17:51:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:30,246 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2021-02-19 17:51:30,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2021-02-19 17:51:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:30,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:30,247 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:30,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2317 [2021-02-19 17:51:30,447 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2134042487, now seen corresponding path program 197 times [2021-02-19 17:51:30,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:30,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899547355] [2021-02-19 17:51:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:30,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899547355] [2021-02-19 17:51:30,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302518859] [2021-02-19 17:51:30,645 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:30,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:30,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:30,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:30,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,988 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 17 treesize of output 13 [2021-02-19 17:51:30,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,002 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 24 treesize of output 18 [2021-02-19 17:51:31,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:31,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-02-19 17:51:31,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:93, output treesize:48 [2021-02-19 17:51:31,358 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_405, o_2, o_4, v_prenex_403], 1=[v_prenex_404, v_prenex_402]} [2021-02-19 17:51:31,365 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 19 treesize of output 15 [2021-02-19 17:51:31,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,455 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 9 treesize of output 7 [2021-02-19 17:51:31,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,534 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:31,540 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 26 treesize of output 20 [2021-02-19 17:51:31,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,627 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 [2021-02-19 17:51:31,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:31,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:31,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:31,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:31,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:31,777 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:85, output treesize:26 [2021-02-19 17:51:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:32,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:32,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465107788] [2021-02-19 17:51:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:32,035 INFO L87 Difference]: Start difference. First operand 355 states and 1072 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:32,847 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:33,086 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 17:51:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:33,912 INFO L93 Difference]: Finished difference Result 797 states and 2431 transitions. [2021-02-19 17:51:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:51:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:33,915 INFO L225 Difference]: With dead ends: 797 [2021-02-19 17:51:33,915 INFO L226 Difference]: Without dead ends: 774 [2021-02-19 17:51:33,915 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:51:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-02-19 17:51:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 355. [2021-02-19 17:51:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0282485875706215) internal successors, (1072), 354 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2021-02-19 17:51:33,921 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 21 [2021-02-19 17:51:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:33,921 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2021-02-19 17:51:33,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2021-02-19 17:51:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:33,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:33,921 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:34,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2332 [2021-02-19 17:51:34,122 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:34,122 INFO L82 PathProgramCache]: Analyzing trace with hash -406636694, now seen corresponding path program 198 times [2021-02-19 17:51:34,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:34,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345021806] [2021-02-19 17:51:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:34,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345021806] [2021-02-19 17:51:34,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867969539] [2021-02-19 17:51:34,499 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:34,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:51:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:34,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,842 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 19 treesize of output 15 [2021-02-19 17:51:34,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:34,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,855 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 26 treesize of output 20 [2021-02-19 17:51:34,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:34,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,868 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 26 treesize of output 20 [2021-02-19 17:51:34,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:34,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:34,880 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 19 treesize of output 15 [2021-02-19 17:51:34,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:35,050 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:51:35,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:35,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:51:35,057 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:157 [2021-02-19 17:51:35,230 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 17:51:35,748 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_415, v_prenex_427, v_prenex_416, o_2, v_prenex_418, v_prenex_419, o_4, v_prenex_432, v_prenex_422, v_prenex_424, v_prenex_413, v_prenex_414], 1=[v_prenex_426, v_prenex_431, v_prenex_421, v_prenex_423]} [2021-02-19 17:51:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:35,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:36,184 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2021-02-19 17:51:36,185 INFO L628 ElimStorePlain]: treesize reduction 62, result has 79.0 percent of original size [2021-02-19 17:51:36,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:51:36,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:36,399 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-19 17:51:36,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:36,400 INFO L518 ElimStorePlain]: Eliminatee v_prenex_416 vanished before elimination [2021-02-19 17:51:36,408 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 39 treesize of output 31 [2021-02-19 17:51:36,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:36,592 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-02-19 17:51:36,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:36,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:36,778 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:51:36,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:36,779 INFO L518 ElimStorePlain]: Eliminatee v_prenex_419 vanished before elimination [2021-02-19 17:51:36,779 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:36,787 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 28 treesize of output 22 [2021-02-19 17:51:36,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:36,962 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 17:51:36,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:36,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_422 vanished before elimination [2021-02-19 17:51:36,971 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 19 treesize of output 15 [2021-02-19 17:51:36,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:37,253 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 17:51:37,253 INFO L628 ElimStorePlain]: treesize reduction 11, result has 92.9 percent of original size [2021-02-19 17:51:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:51:37,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:37,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:37,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_414 vanished before elimination [2021-02-19 17:51:37,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:37,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:37,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:37,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:37,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:37,440 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:37,598 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:51:37,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:37,599 INFO L518 ElimStorePlain]: Eliminatee v_prenex_421 vanished before elimination [2021-02-19 17:51:37,599 INFO L518 ElimStorePlain]: Eliminatee v_prenex_423 vanished before elimination [2021-02-19 17:51:37,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:51:37,608 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:315, output treesize:47 [2021-02-19 17:51:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:37,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:37,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309639339] [2021-02-19 17:51:37,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:37,791 INFO L87 Difference]: Start difference. First operand 355 states and 1072 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:38,378 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:38,519 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 17:51:39,440 WARN L202 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-02-19 17:51:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:39,659 INFO L93 Difference]: Finished difference Result 640 states and 1904 transitions. [2021-02-19 17:51:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:51:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:39,662 INFO L225 Difference]: With dead ends: 640 [2021-02-19 17:51:39,662 INFO L226 Difference]: Without dead ends: 580 [2021-02-19 17:51:39,662 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:51:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-02-19 17:51:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 377. [2021-02-19 17:51:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.007978723404255) internal successors, (1131), 376 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1131 transitions. [2021-02-19 17:51:39,667 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1131 transitions. Word has length 21 [2021-02-19 17:51:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:39,667 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1131 transitions. [2021-02-19 17:51:39,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1131 transitions. [2021-02-19 17:51:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:39,667 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:39,667 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:39,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2347,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:39,868 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash 713150001, now seen corresponding path program 199 times [2021-02-19 17:51:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:39,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668183450] [2021-02-19 17:51:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:40,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668183450] [2021-02-19 17:51:40,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373344459] [2021-02-19 17:51:40,029 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:40,499 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 17 treesize of output 13 [2021-02-19 17:51:40,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:40,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:40,512 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 17 treesize of output 13 [2021-02-19 17:51:40,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:40,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:40,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:40,529 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 24 treesize of output 18 [2021-02-19 17:51:40,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:40,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:40,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-02-19 17:51:40,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:58 [2021-02-19 17:51:40,959 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_435], 1=[o_2, v_prenex_434]} [2021-02-19 17:51:40,965 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 26 treesize of output 20 [2021-02-19 17:51:40,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:41,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:41,034 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 19 treesize of output 15 [2021-02-19 17:51:41,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:41,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:41,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:41,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:41,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:41,133 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 [2021-02-19 17:51:41,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:41,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:41,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:41,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:21 [2021-02-19 17:51:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:41,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:41,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:41,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265502436] [2021-02-19 17:51:41,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:41,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:41,251 INFO L87 Difference]: Start difference. First operand 377 states and 1131 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:42,344 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:42,503 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 17:51:43,112 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:43,888 INFO L93 Difference]: Finished difference Result 650 states and 1955 transitions. [2021-02-19 17:51:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:51:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:43,891 INFO L225 Difference]: With dead ends: 650 [2021-02-19 17:51:43,891 INFO L226 Difference]: Without dead ends: 619 [2021-02-19 17:51:43,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:51:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-19 17:51:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 361. [2021-02-19 17:51:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.025) internal successors, (1089), 360 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1089 transitions. [2021-02-19 17:51:43,896 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1089 transitions. Word has length 21 [2021-02-19 17:51:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:43,896 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1089 transitions. [2021-02-19 17:51:43,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1089 transitions. [2021-02-19 17:51:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:43,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:43,896 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:44,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2368 [2021-02-19 17:51:44,098 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1315953357, now seen corresponding path program 200 times [2021-02-19 17:51:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:44,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474313280] [2021-02-19 17:51:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474313280] [2021-02-19 17:51:44,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524267061] [2021-02-19 17:51:44,427 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:44,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:44,867 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 17 treesize of output 13 [2021-02-19 17:51:44,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:44,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:44,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:44,881 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 24 treesize of output 18 [2021-02-19 17:51:44,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:44,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:44,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:44,899 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 17 treesize of output 13 [2021-02-19 17:51:44,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:44,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:44,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-02-19 17:51:44,967 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:58 [2021-02-19 17:51:45,127 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_438, v_prenex_439, o_4, v_prenex_440], 1=[v_prenex_437, o_2]} [2021-02-19 17:51:45,134 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 26 treesize of output 20 [2021-02-19 17:51:45,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:45,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:51:45,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:45,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:45,289 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 19 treesize of output 15 [2021-02-19 17:51:45,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:45,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:45,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_440 vanished before elimination [2021-02-19 17:51:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:45,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:45,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:45,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:51:45,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:45,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:45,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:45,434 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:85, output treesize:26 [2021-02-19 17:51:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:45,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:45,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:45,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694786271] [2021-02-19 17:51:45,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:45,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:45,568 INFO L87 Difference]: Start difference. First operand 361 states and 1089 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:46,146 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:46,632 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:47,156 INFO L93 Difference]: Finished difference Result 621 states and 1890 transitions. [2021-02-19 17:51:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:51:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:47,160 INFO L225 Difference]: With dead ends: 621 [2021-02-19 17:51:47,160 INFO L226 Difference]: Without dead ends: 598 [2021-02-19 17:51:47,160 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:51:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-02-19 17:51:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 361. [2021-02-19 17:51:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.025) internal successors, (1089), 360 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1089 transitions. [2021-02-19 17:51:47,164 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1089 transitions. Word has length 21 [2021-02-19 17:51:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:47,165 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1089 transitions. [2021-02-19 17:51:47,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1089 transitions. [2021-02-19 17:51:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:47,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:47,165 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:47,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2390,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:47,366 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1100398158, now seen corresponding path program 201 times [2021-02-19 17:51:47,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:47,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465751550] [2021-02-19 17:51:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:47,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465751550] [2021-02-19 17:51:47,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307548050] [2021-02-19 17:51:47,661 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:51:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:47,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:47,918 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 17 treesize of output 13 [2021-02-19 17:51:47,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:47,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:47,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:47,927 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 24 treesize of output 18 [2021-02-19 17:51:47,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:47,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:47,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:47,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:47,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:57 [2021-02-19 17:51:48,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,047 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 19 treesize of output 15 [2021-02-19 17:51:48,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,059 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 26 treesize of output 20 [2021-02-19 17:51:48,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,069 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 9 treesize of output 7 [2021-02-19 17:51:48,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:48,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:48,161 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 [2021-02-19 17:51:48,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:48,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:48,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:48,234 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:99, output treesize:26 [2021-02-19 17:51:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:48,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:48,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160595418] [2021-02-19 17:51:48,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:48,489 INFO L87 Difference]: Start difference. First operand 361 states and 1089 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:48,730 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 17:51:49,192 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:49,341 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 17:51:49,740 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:50,367 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 17:51:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:50,881 INFO L93 Difference]: Finished difference Result 716 states and 2110 transitions. [2021-02-19 17:51:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:51:50,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:50,884 INFO L225 Difference]: With dead ends: 716 [2021-02-19 17:51:50,884 INFO L226 Difference]: Without dead ends: 662 [2021-02-19 17:51:50,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:51:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-02-19 17:51:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 375. [2021-02-19 17:51:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.03475935828877) internal successors, (1135), 374 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1135 transitions. [2021-02-19 17:51:50,890 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1135 transitions. Word has length 21 [2021-02-19 17:51:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:50,890 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 1135 transitions. [2021-02-19 17:51:50,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1135 transitions. [2021-02-19 17:51:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:50,890 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:50,890 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:51,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-02-19 17:51:51,091 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1495879001, now seen corresponding path program 202 times [2021-02-19 17:51:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827382231] [2021-02-19 17:51:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827382231] [2021-02-19 17:51:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344721910] [2021-02-19 17:51:51,409 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:51,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:51:51,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:51:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:51,672 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 19 treesize of output 15 [2021-02-19 17:51:51,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,677 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 26 treesize of output 20 [2021-02-19 17:51:51,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:51,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:51,707 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:59 [2021-02-19 17:51:51,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,799 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 28 treesize of output 22 [2021-02-19 17:51:51,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:51:51,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:51,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,826 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 19 treesize of output 15 [2021-02-19 17:51:51,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,969 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 17:51:51,970 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.9 percent of original size [2021-02-19 17:51:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:51,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:51,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:51,990 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 [2021-02-19 17:51:51,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:52,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:52,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:52,043 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:117, output treesize:26 [2021-02-19 17:51:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:52,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:52,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753197991] [2021-02-19 17:51:52,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:52,328 INFO L87 Difference]: Start difference. First operand 375 states and 1135 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:53,008 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:54,071 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 17:51:54,322 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 17:51:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:54,786 INFO L93 Difference]: Finished difference Result 632 states and 1901 transitions. [2021-02-19 17:51:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:51:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:54,789 INFO L225 Difference]: With dead ends: 632 [2021-02-19 17:51:54,789 INFO L226 Difference]: Without dead ends: 578 [2021-02-19 17:51:54,789 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:51:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-02-19 17:51:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 377. [2021-02-19 17:51:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.026595744680851) internal successors, (1138), 376 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1138 transitions. [2021-02-19 17:51:54,794 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1138 transitions. Word has length 21 [2021-02-19 17:51:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:54,794 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1138 transitions. [2021-02-19 17:51:54,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1138 transitions. [2021-02-19 17:51:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:54,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:54,794 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:54,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:54,995 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1703201514, now seen corresponding path program 203 times [2021-02-19 17:51:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:54,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774525112] [2021-02-19 17:51:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774525112] [2021-02-19 17:51:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035529854] [2021-02-19 17:51:55,300 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:55,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:51:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:55,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:55,641 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 17 treesize of output 13 [2021-02-19 17:51:55,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:51:55,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,658 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 24 treesize of output 18 [2021-02-19 17:51:55,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,667 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 17 treesize of output 13 [2021-02-19 17:51:55,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:55,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:51:55,731 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:57 [2021-02-19 17:51:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,895 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 19 treesize of output 15 [2021-02-19 17:51:55,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,902 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 26 treesize of output 20 [2021-02-19 17:51:55,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:55,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:55,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:55,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 17:51:55,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:56,090 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:51:56,091 INFO L628 ElimStorePlain]: treesize reduction 92, result has 36.6 percent of original size [2021-02-19 17:51:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:56,097 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 [2021-02-19 17:51:56,100 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:56,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:56,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:51:56,167 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:169, output treesize:25 [2021-02-19 17:51:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:56,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:56,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:51:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26194487] [2021-02-19 17:51:56,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:51:56,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:51:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:56,355 INFO L87 Difference]: Start difference. First operand 377 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:56,747 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-19 17:51:56,953 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:57,094 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 17:51:57,431 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:57,986 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 17:51:58,518 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:51:58,704 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 17:51:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:58,903 INFO L93 Difference]: Finished difference Result 619 states and 1811 transitions. [2021-02-19 17:51:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:51:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:51:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:58,905 INFO L225 Difference]: With dead ends: 619 [2021-02-19 17:51:58,905 INFO L226 Difference]: Without dead ends: 556 [2021-02-19 17:51:58,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:51:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-02-19 17:51:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 379. [2021-02-19 17:51:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0238095238095237) internal successors, (1143), 378 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1143 transitions. [2021-02-19 17:51:58,910 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1143 transitions. Word has length 21 [2021-02-19 17:51:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:58,910 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1143 transitions. [2021-02-19 17:51:58,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1143 transitions. [2021-02-19 17:51:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:51:58,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:58,911 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:59,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-02-19 17:51:59,111 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash -912515934, now seen corresponding path program 204 times [2021-02-19 17:51:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:59,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332276620] [2021-02-19 17:51:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332276620] [2021-02-19 17:51:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243673960] [2021-02-19 17:51:59,268 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:59,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:51:59,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:51:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:59,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:59,359 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 17 treesize of output 13 [2021-02-19 17:51:59,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:59,364 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 9 treesize of output 7 [2021-02-19 17:51:59,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:59,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:59,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-02-19 17:51:59,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:29 [2021-02-19 17:51:59,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:59,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:59,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:59,510 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:51:59,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:51:59,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:51:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:59,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:59,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:51:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336336833] [2021-02-19 17:51:59,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:51:59,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:59,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:51:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:51:59,553 INFO L87 Difference]: Start difference. First operand 379 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:00,100 INFO L93 Difference]: Finished difference Result 712 states and 2118 transitions. [2021-02-19 17:52:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:00,103 INFO L225 Difference]: With dead ends: 712 [2021-02-19 17:52:00,103 INFO L226 Difference]: Without dead ends: 690 [2021-02-19 17:52:00,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:52:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-02-19 17:52:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 383. [2021-02-19 17:52:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0340314136125652) internal successors, (1159), 382 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1159 transitions. [2021-02-19 17:52:00,108 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1159 transitions. Word has length 21 [2021-02-19 17:52:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:00,108 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1159 transitions. [2021-02-19 17:52:00,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1159 transitions. [2021-02-19 17:52:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:00,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:00,109 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:00,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2432,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:00,309 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:00,309 INFO L82 PathProgramCache]: Analyzing trace with hash 323393584, now seen corresponding path program 205 times [2021-02-19 17:52:00,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:00,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178707418] [2021-02-19 17:52:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178707418] [2021-02-19 17:52:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676399758] [2021-02-19 17:52:00,639 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:00,801 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 19 treesize of output 15 [2021-02-19 17:52:00,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:00,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:00,808 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 19 treesize of output 15 [2021-02-19 17:52:00,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:00,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:00,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:52:00,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-02-19 17:52:01,526 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_451, v_prenex_444, v_prenex_445, v_prenex_447], 1=[v_prenex_449, v_prenex_446]} [2021-02-19 17:52:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:52:01,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:01,652 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:52:01,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:01,653 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:52:01,661 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 19 treesize of output 15 [2021-02-19 17:52:01,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:01,772 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:52:01,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:52:01,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:01,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:01,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_445 vanished before elimination [2021-02-19 17:52:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:52:01,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:01,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:01,988 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 [2021-02-19 17:52:01,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:02,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:02,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:02,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:02,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:02,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:52:02,195 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:125, output treesize:25 [2021-02-19 17:52:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:02,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:02,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185086205] [2021-02-19 17:52:02,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:02,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:02,362 INFO L87 Difference]: Start difference. First operand 383 states and 1159 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:02,624 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 17:52:03,062 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 17:52:03,300 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-02-19 17:52:03,938 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-02-19 17:52:04,226 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-02-19 17:52:04,921 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 17:52:05,113 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 17:52:05,706 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 17:52:06,001 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 17:52:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:06,207 INFO L93 Difference]: Finished difference Result 900 states and 2661 transitions. [2021-02-19 17:52:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:52:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:06,211 INFO L225 Difference]: With dead ends: 900 [2021-02-19 17:52:06,211 INFO L226 Difference]: Without dead ends: 828 [2021-02-19 17:52:06,211 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:52:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-02-19 17:52:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 385. [2021-02-19 17:52:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0390625) internal successors, (1167), 384 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1167 transitions. [2021-02-19 17:52:06,217 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1167 transitions. Word has length 21 [2021-02-19 17:52:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:06,217 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 1167 transitions. [2021-02-19 17:52:06,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1167 transitions. [2021-02-19 17:52:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:06,218 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:06,218 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:06,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2436 [2021-02-19 17:52:06,418 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1421745259, now seen corresponding path program 206 times [2021-02-19 17:52:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597265684] [2021-02-19 17:52:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:06,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597265684] [2021-02-19 17:52:06,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155288071] [2021-02-19 17:52:06,627 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:06,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:06,876 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 9 treesize of output 7 [2021-02-19 17:52:06,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:06,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:06,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:06,889 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 17 treesize of output 13 [2021-02-19 17:52:06,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:06,899 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 9 treesize of output 7 [2021-02-19 17:52:06,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:06,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:52:06,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:07,020 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-02-19 17:52:07,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:07,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:07,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-02-19 17:52:07,191 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 17:52:07,799 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_456], 1=[o_2, v_prenex_455]} [2021-02-19 17:52:07,806 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 19 treesize of output 15 [2021-02-19 17:52:07,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:07,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:07,876 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 26 treesize of output 20 [2021-02-19 17:52:07,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:07,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:07,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:07,940 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 [2021-02-19 17:52:07,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:07,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:08,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:08,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:08,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:08,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:08,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:08,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:21 [2021-02-19 17:52:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:08,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:08,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:08,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997807164] [2021-02-19 17:52:08,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:08,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:08,213 INFO L87 Difference]: Start difference. First operand 385 states and 1167 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:08,422 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 17:52:08,608 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:52:08,963 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 17:52:09,119 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:52:09,772 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 17:52:09,951 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 17:52:10,138 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:52:10,458 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 17:52:10,712 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:52:11,326 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-02-19 17:52:11,723 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 17:52:12,008 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:52:12,397 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 17:52:12,734 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 17:52:12,951 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 17:52:13,437 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-02-19 17:52:13,854 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 17:52:14,359 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 17:52:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:14,421 INFO L93 Difference]: Finished difference Result 1133 states and 3283 transitions. [2021-02-19 17:52:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:52:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:14,425 INFO L225 Difference]: With dead ends: 1133 [2021-02-19 17:52:14,425 INFO L226 Difference]: Without dead ends: 1076 [2021-02-19 17:52:14,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=380, Invalid=1690, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:52:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-02-19 17:52:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 390. [2021-02-19 17:52:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0539845758354756) internal successors, (1188), 389 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1188 transitions. [2021-02-19 17:52:14,432 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1188 transitions. Word has length 21 [2021-02-19 17:52:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:14,432 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1188 transitions. [2021-02-19 17:52:14,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1188 transitions. [2021-02-19 17:52:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:14,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:14,433 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:14,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2460 [2021-02-19 17:52:14,633 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash 247540431, now seen corresponding path program 207 times [2021-02-19 17:52:14,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:14,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317873580] [2021-02-19 17:52:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317873580] [2021-02-19 17:52:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235706048] [2021-02-19 17:52:14,910 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:14,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:52:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:15,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,165 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 17 treesize of output 13 [2021-02-19 17:52:15,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:15,178 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 17 treesize of output 13 [2021-02-19 17:52:15,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:52:15,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,199 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 9 treesize of output 7 [2021-02-19 17:52:15,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:15,322 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-02-19 17:52:15,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:15,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:15,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-02-19 17:52:15,495 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 17:52:16,151 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_461], 1=[o_2, v_prenex_460]} [2021-02-19 17:52:16,158 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 19 treesize of output 15 [2021-02-19 17:52:16,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:16,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:16,231 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 26 treesize of output 20 [2021-02-19 17:52:16,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:16,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:16,300 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 [2021-02-19 17:52:16,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:16,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:16,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:16,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:16,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:16,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:16,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:21 [2021-02-19 17:52:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:16,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:16,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952788913] [2021-02-19 17:52:16,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:16,597 INFO L87 Difference]: Start difference. First operand 390 states and 1188 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:17,067 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 17:52:17,341 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-02-19 17:52:18,336 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 17:52:18,596 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:52:19,229 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 17:52:19,566 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:52:19,998 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 17:52:20,281 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 17:52:20,511 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:52:21,057 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 17:52:21,413 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 17:52:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:21,577 INFO L93 Difference]: Finished difference Result 1004 states and 2972 transitions. [2021-02-19 17:52:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:52:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:21,580 INFO L225 Difference]: With dead ends: 1004 [2021-02-19 17:52:21,580 INFO L226 Difference]: Without dead ends: 966 [2021-02-19 17:52:21,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:52:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-02-19 17:52:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 392. [2021-02-19 17:52:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.051150895140665) internal successors, (1193), 391 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1193 transitions. [2021-02-19 17:52:21,585 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1193 transitions. Word has length 21 [2021-02-19 17:52:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:21,586 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1193 transitions. [2021-02-19 17:52:21,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1193 transitions. [2021-02-19 17:52:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:21,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:21,586 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:21,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2478 [2021-02-19 17:52:21,794 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash 850343787, now seen corresponding path program 208 times [2021-02-19 17:52:21,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:21,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012369543] [2021-02-19 17:52:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:22,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012369543] [2021-02-19 17:52:22,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515633970] [2021-02-19 17:52:22,139 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:22,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:22,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,410 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 17 treesize of output 13 [2021-02-19 17:52:22,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,420 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 9 treesize of output 7 [2021-02-19 17:52:22,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,431 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 9 treesize of output 7 [2021-02-19 17:52:22,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:22,442 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 17 treesize of output 13 [2021-02-19 17:52:22,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:22,567 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-02-19 17:52:22,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:22,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:22,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:105, output treesize:73 [2021-02-19 17:52:23,003 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_466, v_prenex_468], 1=[v_prenex_465, v_prenex_467]} [2021-02-19 17:52:23,010 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 9 treesize of output 7 [2021-02-19 17:52:23,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:23,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:23,083 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:52:23,089 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 19 treesize of output 15 [2021-02-19 17:52:23,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:23,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:23,174 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 26 treesize of output 20 [2021-02-19 17:52:23,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:23,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:23,256 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 [2021-02-19 17:52:23,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:23,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:23,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:23,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:23,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:52:23,408 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:85, output treesize:26 [2021-02-19 17:52:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:23,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:23,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:23,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367847480] [2021-02-19 17:52:23,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:23,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:23,718 INFO L87 Difference]: Start difference. First operand 392 states and 1193 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:24,036 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 17:52:24,412 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-02-19 17:52:25,224 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 17:52:25,391 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 17:52:25,763 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 17:52:25,912 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:52:26,367 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 17:52:26,752 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 17:52:27,046 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:52:27,777 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 17:52:27,947 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 17:52:28,161 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:52:28,691 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 17:52:29,041 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 17:52:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:29,335 INFO L93 Difference]: Finished difference Result 1078 states and 3198 transitions. [2021-02-19 17:52:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:52:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:29,338 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 17:52:29,338 INFO L226 Difference]: Without dead ends: 1032 [2021-02-19 17:52:29,338 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:52:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-02-19 17:52:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 389. [2021-02-19 17:52:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.064432989690722) internal successors, (1189), 388 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1189 transitions. [2021-02-19 17:52:29,347 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1189 transitions. Word has length 21 [2021-02-19 17:52:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 1189 transitions. [2021-02-19 17:52:29,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1189 transitions. [2021-02-19 17:52:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:29,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:29,348 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:29,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:29,548 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash 408922314, now seen corresponding path program 209 times [2021-02-19 17:52:29,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:29,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838673452] [2021-02-19 17:52:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:29,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838673452] [2021-02-19 17:52:29,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750634965] [2021-02-19 17:52:29,817 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:29,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:52:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:29,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:29,997 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 17 treesize of output 13 [2021-02-19 17:52:30,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:30,011 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 17 treesize of output 13 [2021-02-19 17:52:30,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:52:30,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,032 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 9 treesize of output 7 [2021-02-19 17:52:30,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:30,178 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-02-19 17:52:30,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:30,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:30,184 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:129, output treesize:77 [2021-02-19 17:52:30,344 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 17:52:31,032 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_474], 1=[o_2, v_prenex_473]} [2021-02-19 17:52:31,036 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 19 treesize of output 15 [2021-02-19 17:52:31,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:31,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:31,075 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 26 treesize of output 20 [2021-02-19 17:52:31,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:31,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:31,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:31,112 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 10 treesize of output 5 [2021-02-19 17:52:31,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:31,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:31,146 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 20 treesize of output 9 [2021-02-19 17:52:31,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:31,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:31,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:31,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:71, output treesize:25 [2021-02-19 17:52:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:31,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:31,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:31,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395939015] [2021-02-19 17:52:31,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:31,390 INFO L87 Difference]: Start difference. First operand 389 states and 1189 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:32,184 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 17:52:32,555 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-02-19 17:52:32,908 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-02-19 17:52:33,091 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 17:52:33,562 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-19 17:52:33,942 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 17:52:34,245 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 17:52:34,793 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-02-19 17:52:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:34,917 INFO L93 Difference]: Finished difference Result 651 states and 1951 transitions. [2021-02-19 17:52:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:52:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:34,919 INFO L225 Difference]: With dead ends: 651 [2021-02-19 17:52:34,919 INFO L226 Difference]: Without dead ends: 629 [2021-02-19 17:52:34,919 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:52:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-02-19 17:52:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 392. [2021-02-19 17:52:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.061381074168798) internal successors, (1197), 391 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1197 transitions. [2021-02-19 17:52:34,923 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1197 transitions. Word has length 21 [2021-02-19 17:52:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:34,923 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1197 transitions. [2021-02-19 17:52:34,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1197 transitions. [2021-02-19 17:52:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:34,924 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:34,924 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:35,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-02-19 17:52:35,138 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2005292044, now seen corresponding path program 210 times [2021-02-19 17:52:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:35,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579330349] [2021-02-19 17:52:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:35,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579330349] [2021-02-19 17:52:35,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78447926] [2021-02-19 17:52:35,436 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:35,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:52:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:52:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:35,560 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 17 treesize of output 13 [2021-02-19 17:52:35,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:35,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:52:35,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:35,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:35,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:35,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:52:35,728 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 9 treesize of output 7 [2021-02-19 17:52:35,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:35,737 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 19 treesize of output 15 [2021-02-19 17:52:35,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:35,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:35,767 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:52:35,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:35,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-02-19 17:52:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:35,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:35,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:52:35,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549314046] [2021-02-19 17:52:35,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:52:35,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:52:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:52:35,884 INFO L87 Difference]: Start difference. First operand 392 states and 1197 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:36,487 INFO L93 Difference]: Finished difference Result 645 states and 1932 transitions. [2021-02-19 17:52:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:36,490 INFO L225 Difference]: With dead ends: 645 [2021-02-19 17:52:36,490 INFO L226 Difference]: Without dead ends: 616 [2021-02-19 17:52:36,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:52:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-02-19 17:52:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 392. [2021-02-19 17:52:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.061381074168798) internal successors, (1197), 391 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1197 transitions. [2021-02-19 17:52:36,496 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1197 transitions. Word has length 21 [2021-02-19 17:52:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:36,496 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1197 transitions. [2021-02-19 17:52:36,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1197 transitions. [2021-02-19 17:52:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:36,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:36,496 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:36,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2531,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:36,710 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 670217418, now seen corresponding path program 211 times [2021-02-19 17:52:36,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:36,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907151879] [2021-02-19 17:52:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907151879] [2021-02-19 17:52:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307444011] [2021-02-19 17:52:37,074 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:52:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:52:37,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:37,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:37,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:37,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-02-19 17:52:37,486 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 19 treesize of output 15 [2021-02-19 17:52:37,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:37,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:37,498 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:52:37,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:37,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:52:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:37,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:37,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:52:37,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905195315] [2021-02-19 17:52:37,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:52:37,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:52:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:52:37,521 INFO L87 Difference]: Start difference. First operand 392 states and 1197 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:37,890 INFO L93 Difference]: Finished difference Result 536 states and 1615 transitions. [2021-02-19 17:52:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:37,893 INFO L225 Difference]: With dead ends: 536 [2021-02-19 17:52:37,893 INFO L226 Difference]: Without dead ends: 514 [2021-02-19 17:52:37,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:52:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-02-19 17:52:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 399. [2021-02-19 17:52:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.07035175879397) internal successors, (1222), 398 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1222 transitions. [2021-02-19 17:52:37,897 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1222 transitions. Word has length 21 [2021-02-19 17:52:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:37,897 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1222 transitions. [2021-02-19 17:52:37,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1222 transitions. [2021-02-19 17:52:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:37,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:37,898 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:38,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-02-19 17:52:38,098 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1779367040, now seen corresponding path program 212 times [2021-02-19 17:52:38,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:38,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283354870] [2021-02-19 17:52:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:38,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283354870] [2021-02-19 17:52:38,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628896166] [2021-02-19 17:52:38,447 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:38,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:52:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:38,701 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 17 treesize of output 13 [2021-02-19 17:52:38,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:38,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:38,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:38,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-02-19 17:52:38,780 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 19 treesize of output 15 [2021-02-19 17:52:38,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:38,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:38,797 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:52:38,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:38,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:12 [2021-02-19 17:52:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:38,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:38,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:52:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429679814] [2021-02-19 17:52:38,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:52:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:52:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:52:38,868 INFO L87 Difference]: Start difference. First operand 399 states and 1222 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:39,349 INFO L93 Difference]: Finished difference Result 527 states and 1591 transitions. [2021-02-19 17:52:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:39,351 INFO L225 Difference]: With dead ends: 527 [2021-02-19 17:52:39,351 INFO L226 Difference]: Without dead ends: 505 [2021-02-19 17:52:39,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:52:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-02-19 17:52:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 396. [2021-02-19 17:52:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0632911392405062) internal successors, (1210), 395 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1210 transitions. [2021-02-19 17:52:39,355 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1210 transitions. Word has length 21 [2021-02-19 17:52:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1210 transitions. [2021-02-19 17:52:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1210 transitions. [2021-02-19 17:52:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:39,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:39,356 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:39,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2539,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:39,556 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1273020774, now seen corresponding path program 213 times [2021-02-19 17:52:39,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:39,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517463134] [2021-02-19 17:52:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:39,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517463134] [2021-02-19 17:52:39,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271612316] [2021-02-19 17:52:39,896 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:39,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:52:39,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:52:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,319 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 17 treesize of output 13 [2021-02-19 17:52:40,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:40,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 17:52:40,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-02-19 17:52:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:52:40,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:40,480 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 10 treesize of output 5 [2021-02-19 17:52:40,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:40,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:40,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-02-19 17:52:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:40,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:40,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:52:40,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551552813] [2021-02-19 17:52:40,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:52:40,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:52:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:52:40,584 INFO L87 Difference]: Start difference. First operand 396 states and 1210 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:41,259 INFO L93 Difference]: Finished difference Result 530 states and 1597 transitions. [2021-02-19 17:52:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:41,262 INFO L225 Difference]: With dead ends: 530 [2021-02-19 17:52:41,262 INFO L226 Difference]: Without dead ends: 508 [2021-02-19 17:52:41,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:52:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-02-19 17:52:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 393. [2021-02-19 17:52:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.063775510204082) internal successors, (1201), 392 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1201 transitions. [2021-02-19 17:52:41,266 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1201 transitions. Word has length 21 [2021-02-19 17:52:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:41,267 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 1201 transitions. [2021-02-19 17:52:41,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1201 transitions. [2021-02-19 17:52:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:41,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:41,267 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:41,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-02-19 17:52:41,468 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1085787738, now seen corresponding path program 214 times [2021-02-19 17:52:41,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:41,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662499835] [2021-02-19 17:52:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:41,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662499835] [2021-02-19 17:52:41,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866302915] [2021-02-19 17:52:41,670 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:41,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:52:41,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:52:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:41,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,002 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 17 treesize of output 13 [2021-02-19 17:52:42,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,013 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 9 treesize of output 7 [2021-02-19 17:52:42,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:42,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:52:42,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-02-19 17:52:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,589 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 19 treesize of output 15 [2021-02-19 17:52:42,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:42,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:42,626 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:52:42,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:42,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:52:42,655 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:9 [2021-02-19 17:52:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:42,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:42,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:52:42,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427884012] [2021-02-19 17:52:42,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:52:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:52:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:52:42,700 INFO L87 Difference]: Start difference. First operand 393 states and 1201 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-02-19 17:52:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:43,589 INFO L93 Difference]: Finished difference Result 548 states and 1654 transitions. [2021-02-19 17:52:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:52:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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 21 [2021-02-19 17:52:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:43,592 INFO L225 Difference]: With dead ends: 548 [2021-02-19 17:52:43,592 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:52:43,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:52:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:52:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 400. [2021-02-19 17:52:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.080200501253133) internal successors, (1229), 399 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1229 transitions. [2021-02-19 17:52:43,597 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1229 transitions. Word has length 21 [2021-02-19 17:52:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:43,597 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1229 transitions. [2021-02-19 17:52:43,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-02-19 17:52:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1229 transitions. [2021-02-19 17:52:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:43,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:43,598 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:43,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2545,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:43,798 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2100029936, now seen corresponding path program 215 times [2021-02-19 17:52:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:43,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110918177] [2021-02-19 17:52:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110918177] [2021-02-19 17:52:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547110434] [2021-02-19 17:52:44,019 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:44,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:44,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:44,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:44,369 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 17 treesize of output 13 [2021-02-19 17:52:44,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:44,380 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 9 treesize of output 7 [2021-02-19 17:52:44,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:44,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:44,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:44,395 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 17 treesize of output 13 [2021-02-19 17:52:44,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:44,406 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 9 treesize of output 7 [2021-02-19 17:52:44,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:44,613 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:52:44,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:44,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:149, output treesize:101 [2021-02-19 17:52:44,850 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:52:45,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:45,274 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 19 treesize of output 15 [2021-02-19 17:52:45,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:45,387 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:52:45,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:45,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:45,396 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 10 treesize of output 5 [2021-02-19 17:52:45,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:45,507 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:52:45,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:45,515 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 19 treesize of output 15 [2021-02-19 17:52:45,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:45,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:45,625 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 10 treesize of output 5 [2021-02-19 17:52:45,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:45,730 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:52:45,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:45,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:45,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:35 [2021-02-19 17:52:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:45,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:45,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:45,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632560038] [2021-02-19 17:52:45,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:45,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:45,989 INFO L87 Difference]: Start difference. First operand 400 states and 1229 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:46,794 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:52:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:46,927 INFO L93 Difference]: Finished difference Result 548 states and 1654 transitions. [2021-02-19 17:52:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:52:46,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:46,930 INFO L225 Difference]: With dead ends: 548 [2021-02-19 17:52:46,930 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 17:52:46,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:52:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 17:52:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 397. [2021-02-19 17:52:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.073232323232323) internal successors, (1217), 396 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1217 transitions. [2021-02-19 17:52:46,935 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1217 transitions. Word has length 21 [2021-02-19 17:52:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:46,935 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1217 transitions. [2021-02-19 17:52:46,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1217 transitions. [2021-02-19 17:52:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:46,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:46,936 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:47,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2556 [2021-02-19 17:52:47,136 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1205626198, now seen corresponding path program 216 times [2021-02-19 17:52:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:47,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698138236] [2021-02-19 17:52:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698138236] [2021-02-19 17:52:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47329631] [2021-02-19 17:52:47,518 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:47,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:52:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:47,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:47,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:47,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:47,834 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 19 treesize of output 15 [2021-02-19 17:52:47,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:47,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:47,841 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 19 treesize of output 15 [2021-02-19 17:52:47,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:47,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:47,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:52:47,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:52:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:52:49,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,253 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 19 treesize of output 15 [2021-02-19 17:52:49,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:49,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,356 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 [2021-02-19 17:52:49,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,500 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:52:49,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,510 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 28 treesize of output 22 [2021-02-19 17:52:49,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:52:49,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,674 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:52:49,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:49,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:49,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:49,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:49,850 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-19 17:52:49,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:49,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:52:49,861 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:145, output treesize:21 [2021-02-19 17:52:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:50,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:50,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:50,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86614753] [2021-02-19 17:52:50,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:50,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:50,060 INFO L87 Difference]: Start difference. First operand 397 states and 1217 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:50,439 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 17:52:51,342 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-02-19 17:52:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:51,853 INFO L93 Difference]: Finished difference Result 666 states and 1986 transitions. [2021-02-19 17:52:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:52:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:51,856 INFO L225 Difference]: With dead ends: 666 [2021-02-19 17:52:51,856 INFO L226 Difference]: Without dead ends: 606 [2021-02-19 17:52:51,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:52:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-02-19 17:52:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 397. [2021-02-19 17:52:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0656565656565657) internal successors, (1214), 396 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1214 transitions. [2021-02-19 17:52:51,862 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1214 transitions. Word has length 21 [2021-02-19 17:52:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:51,862 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1214 transitions. [2021-02-19 17:52:51,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1214 transitions. [2021-02-19 17:52:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:51,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:51,862 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:52,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-02-19 17:52:52,063 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:52,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash -85839503, now seen corresponding path program 217 times [2021-02-19 17:52:52,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:52,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830878112] [2021-02-19 17:52:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830878112] [2021-02-19 17:52:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678217595] [2021-02-19 17:52:52,435 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:52,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:52,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:52:52,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:52,872 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 9 treesize of output 7 [2021-02-19 17:52:52,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:52,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:52,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:52,886 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 17 treesize of output 13 [2021-02-19 17:52:52,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:52,897 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 17 treesize of output 13 [2021-02-19 17:52:52,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:53,102 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:52:53,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:53,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:53,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:149, output treesize:101 [2021-02-19 17:52:53,356 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:52:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:54,250 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 19 treesize of output 15 [2021-02-19 17:52:54,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:54,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:54,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:54,350 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 [2021-02-19 17:52:54,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:54,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:54,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:54,446 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 26 treesize of output 20 [2021-02-19 17:52:54,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:54,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:52:54,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:54,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:54,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:52:54,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:21 [2021-02-19 17:52:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:52:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:52:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960729410] [2021-02-19 17:52:54,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:52:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:52:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:52:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:52:54,835 INFO L87 Difference]: Start difference. First operand 397 states and 1214 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:55,786 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-02-19 17:52:56,445 WARN L202 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-02-19 17:52:56,788 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-19 17:52:57,327 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-02-19 17:52:57,815 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 17:52:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:52:58,211 INFO L93 Difference]: Finished difference Result 651 states and 1941 transitions. [2021-02-19 17:52:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:52:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:52:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:52:58,215 INFO L225 Difference]: With dead ends: 651 [2021-02-19 17:52:58,215 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 17:52:58,215 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:52:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 17:52:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 406. [2021-02-19 17:52:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.079012345679012) internal successors, (1247), 405 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1247 transitions. [2021-02-19 17:52:58,220 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1247 transitions. Word has length 21 [2021-02-19 17:52:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:52:58,220 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 1247 transitions. [2021-02-19 17:52:58,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:52:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1247 transitions. [2021-02-19 17:52:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:52:58,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:52:58,221 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:52:58,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2605,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:58,423 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:52:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:52:58,423 INFO L82 PathProgramCache]: Analyzing trace with hash 516963853, now seen corresponding path program 218 times [2021-02-19 17:52:58,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:52:58,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023622189] [2021-02-19 17:52:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:52:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:52:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:52:58,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023622189] [2021-02-19 17:52:58,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704682680] [2021-02-19 17:52:58,836 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:52:58,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:52:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:52:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:52:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:52:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:59,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:59,317 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 17 treesize of output 13 [2021-02-19 17:52:59,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:59,328 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 9 treesize of output 7 [2021-02-19 17:52:59,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:59,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:59,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:52:59,341 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 17 treesize of output 13 [2021-02-19 17:52:59,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:59,352 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 9 treesize of output 7 [2021-02-19 17:52:59,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:52:59,555 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:52:59,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:52:59,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:52:59,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:149, output treesize:101 [2021-02-19 17:52:59,799 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:53:00,339 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_499, v_prenex_500], 1=[v_prenex_503, o_2, o_4, v_prenex_501]} [2021-02-19 17:53:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:53:00,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:00,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:00,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_500 vanished before elimination [2021-02-19 17:53:00,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:00,410 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 19 treesize of output 15 [2021-02-19 17:53:00,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:00,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:00,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:00,467 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 26 treesize of output 20 [2021-02-19 17:53:00,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:00,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:00,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:53:00,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:00,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:00,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:00,591 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 [2021-02-19 17:53:00,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:00,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:00,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:53:00,696 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:97, output treesize:26 [2021-02-19 17:53:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:01,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:01,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:01,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469783828] [2021-02-19 17:53:01,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:01,030 INFO L87 Difference]: Start difference. First operand 406 states and 1247 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:02,572 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-02-19 17:53:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:03,107 INFO L93 Difference]: Finished difference Result 689 states and 2092 transitions. [2021-02-19 17:53:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:53:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:03,111 INFO L225 Difference]: With dead ends: 689 [2021-02-19 17:53:03,111 INFO L226 Difference]: Without dead ends: 666 [2021-02-19 17:53:03,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:53:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-02-19 17:53:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 402. [2021-02-19 17:53:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.079800498753117) internal successors, (1235), 401 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1235 transitions. [2021-02-19 17:53:03,117 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1235 transitions. Word has length 21 [2021-02-19 17:53:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:03,117 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1235 transitions. [2021-02-19 17:53:03,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1235 transitions. [2021-02-19 17:53:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:03,118 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:03,118 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:03,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-02-19 17:53:03,319 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash -232697072, now seen corresponding path program 219 times [2021-02-19 17:53:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531114873] [2021-02-19 17:53:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:03,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531114873] [2021-02-19 17:53:03,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390148945] [2021-02-19 17:53:03,726 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:03,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:53:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:03,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:53:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:04,088 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 9 treesize of output 7 [2021-02-19 17:53:04,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:04,099 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 17 treesize of output 13 [2021-02-19 17:53:04,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:04,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:04,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:04,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:41 [2021-02-19 17:53:04,678 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_507, v_prenex_508], 1=[o_2, o_4]} [2021-02-19 17:53:04,682 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 9 treesize of output 7 [2021-02-19 17:53:04,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:04,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:04,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_508 vanished before elimination [2021-02-19 17:53:04,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:04,714 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 19 treesize of output 15 [2021-02-19 17:53:04,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:04,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:04,743 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 10 treesize of output 5 [2021-02-19 17:53:04,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:04,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:04,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:04,770 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:51, output treesize:15 [2021-02-19 17:53:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:04,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:53:04,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366770077] [2021-02-19 17:53:04,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:53:04,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:53:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:53:04,902 INFO L87 Difference]: Start difference. First operand 402 states and 1235 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:05,670 INFO L93 Difference]: Finished difference Result 564 states and 1708 transitions. [2021-02-19 17:53:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:53:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:05,674 INFO L225 Difference]: With dead ends: 564 [2021-02-19 17:53:05,674 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 17:53:05,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:53:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 17:53:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 402. [2021-02-19 17:53:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.079800498753117) internal successors, (1235), 401 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1235 transitions. [2021-02-19 17:53:05,679 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1235 transitions. Word has length 21 [2021-02-19 17:53:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:05,679 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1235 transitions. [2021-02-19 17:53:05,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1235 transitions. [2021-02-19 17:53:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:05,679 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:05,679 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:05,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2654 [2021-02-19 17:53:05,880 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1327395990, now seen corresponding path program 220 times [2021-02-19 17:53:05,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:05,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088684093] [2021-02-19 17:53:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088684093] [2021-02-19 17:53:06,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492221733] [2021-02-19 17:53:06,146 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:06,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:06,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,554 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 19 treesize of output 15 [2021-02-19 17:53:06,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:06,565 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 19 treesize of output 15 [2021-02-19 17:53:06,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:06,687 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:53:06,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:06,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:06,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:53:07,709 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_511, v_prenex_512], 1=[v_prenex_514, v_prenex_519, v_prenex_520, v_prenex_513]} [2021-02-19 17:53:07,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:07,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:07,880 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 17:53:07,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:07,881 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:53:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:07,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:07,990 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:53:07,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:07,990 INFO L518 ElimStorePlain]: Eliminatee v_prenex_512 vanished before elimination [2021-02-19 17:53:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:07,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:53:07,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:08,159 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 17:53:08,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:08,168 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 19 treesize of output 15 [2021-02-19 17:53:08,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:08,345 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:53:08,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:08,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:08,353 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 [2021-02-19 17:53:08,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:08,543 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 17:53:08,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:08,552 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 [2021-02-19 17:53:08,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:08,745 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 17:53:08,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:08,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:08,750 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:165, output treesize:52 [2021-02-19 17:53:09,000 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-02-19 17:53:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:09,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:09,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583735401] [2021-02-19 17:53:09,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:09,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:09,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:09,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:09,236 INFO L87 Difference]: Start difference. First operand 402 states and 1235 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:09,665 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 17:53:09,842 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 17:53:10,206 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 17:53:10,491 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 17:53:11,267 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 17:53:11,581 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-02-19 17:53:12,012 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 17:53:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:12,174 INFO L93 Difference]: Finished difference Result 784 states and 2335 transitions. [2021-02-19 17:53:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:53:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:12,179 INFO L225 Difference]: With dead ends: 784 [2021-02-19 17:53:12,179 INFO L226 Difference]: Without dead ends: 709 [2021-02-19 17:53:12,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:53:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-02-19 17:53:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 403. [2021-02-19 17:53:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1044776119402986) internal successors, (1248), 402 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1248 transitions. [2021-02-19 17:53:12,185 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1248 transitions. Word has length 21 [2021-02-19 17:53:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:12,185 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1248 transitions. [2021-02-19 17:53:12,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1248 transitions. [2021-02-19 17:53:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:12,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:12,185 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:12,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:12,386 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash 780376083, now seen corresponding path program 221 times [2021-02-19 17:53:12,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:12,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161662757] [2021-02-19 17:53:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:12,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161662757] [2021-02-19 17:53:12,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632623561] [2021-02-19 17:53:12,755 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:12,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:53:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:13,301 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 9 treesize of output 7 [2021-02-19 17:53:13,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,317 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 17 treesize of output 13 [2021-02-19 17:53:13,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:13,330 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 17 treesize of output 13 [2021-02-19 17:53:13,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,341 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 9 treesize of output 7 [2021-02-19 17:53:13,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:13,552 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:53:13,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:13,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:53:13,569 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:149, output treesize:101 [2021-02-19 17:53:13,812 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:53:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:14,264 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 19 treesize of output 15 [2021-02-19 17:53:14,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:14,383 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:53:14,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:14,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:53:14,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:14,507 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:53:14,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:14,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:14,513 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 19 treesize of output 15 [2021-02-19 17:53:14,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:14,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:14,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:14,575 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 [2021-02-19 17:53:14,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:14,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:14,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:14,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:34 [2021-02-19 17:53:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:14,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:14,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:14,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878677194] [2021-02-19 17:53:14,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:14,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:14,892 INFO L87 Difference]: Start difference. First operand 403 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:15,218 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 17:53:15,489 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 17:53:15,790 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 17:53:15,986 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 17:53:16,220 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:53:16,420 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:53:16,684 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 17:53:17,156 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 17:53:18,170 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:53:18,523 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 17:53:18,759 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 17:53:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:18,991 INFO L93 Difference]: Finished difference Result 751 states and 2261 transitions. [2021-02-19 17:53:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:53:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:18,995 INFO L225 Difference]: With dead ends: 751 [2021-02-19 17:53:18,995 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 17:53:18,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:53:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 17:53:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 403. [2021-02-19 17:53:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1044776119402986) internal successors, (1248), 402 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1248 transitions. [2021-02-19 17:53:19,001 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1248 transitions. Word has length 21 [2021-02-19 17:53:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:19,001 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1248 transitions. [2021-02-19 17:53:19,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1248 transitions. [2021-02-19 17:53:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:19,001 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:19,002 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:19,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2722 [2021-02-19 17:53:19,202 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash -437630298, now seen corresponding path program 222 times [2021-02-19 17:53:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:19,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733919681] [2021-02-19 17:53:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:19,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733919681] [2021-02-19 17:53:19,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914851847] [2021-02-19 17:53:19,611 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:19,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:53:19,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:19,911 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 9 treesize of output 7 [2021-02-19 17:53:19,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:19,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:19,919 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 17 treesize of output 13 [2021-02-19 17:53:19,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:19,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:53:19,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:19,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:19,933 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 17 treesize of output 13 [2021-02-19 17:53:19,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:20,046 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:53:20,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:20,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:53:20,061 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:149, output treesize:101 [2021-02-19 17:53:20,302 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:53:20,418 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_527, o_2, v_prenex_528, o_4], 1=[v_prenex_529, v_prenex_530, v_prenex_531, v_prenex_532]} [2021-02-19 17:53:20,424 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 9 treesize of output 7 [2021-02-19 17:53:20,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:20,619 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:53:20,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:20,628 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 9 treesize of output 7 [2021-02-19 17:53:20,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:20,824 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:53:20,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:20,825 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-02-19 17:53:20,825 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:53:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:20,835 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 19 treesize of output 15 [2021-02-19 17:53:20,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:21,024 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:53:21,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:21,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:53:21,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:21,218 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:53:21,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:21,228 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 19 treesize of output 15 [2021-02-19 17:53:21,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:21,406 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:53:21,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:21,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:21,416 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 10 treesize of output 5 [2021-02-19 17:53:21,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:21,602 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 17:53:21,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:21,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:21,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:137, output treesize:61 [2021-02-19 17:53:21,794 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-02-19 17:53:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:22,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:22,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433450470] [2021-02-19 17:53:22,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:22,175 INFO L87 Difference]: Start difference. First operand 403 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:23,286 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-02-19 17:53:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:23,457 INFO L93 Difference]: Finished difference Result 612 states and 1841 transitions. [2021-02-19 17:53:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:53:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:23,461 INFO L225 Difference]: With dead ends: 612 [2021-02-19 17:53:23,461 INFO L226 Difference]: Without dead ends: 561 [2021-02-19 17:53:23,461 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:53:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-02-19 17:53:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 403. [2021-02-19 17:53:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1044776119402986) internal successors, (1248), 402 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1248 transitions. [2021-02-19 17:53:23,466 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1248 transitions. Word has length 21 [2021-02-19 17:53:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:23,466 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1248 transitions. [2021-02-19 17:53:23,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1248 transitions. [2021-02-19 17:53:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:23,467 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:23,467 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:23,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2736,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:23,667 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:23,667 INFO L82 PathProgramCache]: Analyzing trace with hash -336877393, now seen corresponding path program 223 times [2021-02-19 17:53:23,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:23,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168581436] [2021-02-19 17:53:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168581436] [2021-02-19 17:53:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797478421] [2021-02-19 17:53:23,989 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:24,447 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 9 treesize of output 7 [2021-02-19 17:53:24,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,465 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 17 treesize of output 13 [2021-02-19 17:53:24,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,477 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 9 treesize of output 7 [2021-02-19 17:53:24,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:24,490 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 17 treesize of output 13 [2021-02-19 17:53:24,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:24,707 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:53:24,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:24,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:53:24,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:149, output treesize:101 [2021-02-19 17:53:24,962 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:53:25,093 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_536, v_prenex_539, v_prenex_540, v_prenex_535], 1=[v_prenex_537, v_prenex_538, o_2, o_4]} [2021-02-19 17:53:25,101 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 9 treesize of output 7 [2021-02-19 17:53:25,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:25,306 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:53:25,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:25,315 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 9 treesize of output 7 [2021-02-19 17:53:25,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:25,504 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 17:53:25,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:25,505 INFO L518 ElimStorePlain]: Eliminatee v_prenex_540 vanished before elimination [2021-02-19 17:53:25,505 INFO L518 ElimStorePlain]: Eliminatee v_prenex_535 vanished before elimination [2021-02-19 17:53:25,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:25,513 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 19 treesize of output 15 [2021-02-19 17:53:25,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:25,696 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:53:25,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:25,705 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 [2021-02-19 17:53:25,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:25,886 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:53:25,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:25,895 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 19 treesize of output 15 [2021-02-19 17:53:25,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:26,072 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:53:26,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:26,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:26,081 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 [2021-02-19 17:53:26,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:26,202 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:53:26,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:26,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:26,204 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:137, output treesize:60 [2021-02-19 17:53:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:26,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:26,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10408103] [2021-02-19 17:53:26,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:26,595 INFO L87 Difference]: Start difference. First operand 403 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:27,015 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 17:53:27,389 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-19 17:53:27,650 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 17:53:27,885 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 17:53:28,220 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:53:28,461 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 17:53:29,169 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 17:53:29,749 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 17:53:30,193 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 17:53:30,722 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 17:53:31,120 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 17:53:31,422 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:53:31,613 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:53:32,104 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:53:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:32,405 INFO L93 Difference]: Finished difference Result 928 states and 2781 transitions. [2021-02-19 17:53:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:53:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:32,410 INFO L225 Difference]: With dead ends: 928 [2021-02-19 17:53:32,410 INFO L226 Difference]: Without dead ends: 886 [2021-02-19 17:53:32,410 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:53:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-02-19 17:53:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 403. [2021-02-19 17:53:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1044776119402986) internal successors, (1248), 402 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1248 transitions. [2021-02-19 17:53:32,416 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1248 transitions. Word has length 21 [2021-02-19 17:53:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1248 transitions. [2021-02-19 17:53:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1248 transitions. [2021-02-19 17:53:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:32,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:32,417 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:32,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2746 [2021-02-19 17:53:32,617 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 929471604, now seen corresponding path program 224 times [2021-02-19 17:53:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752074150] [2021-02-19 17:53:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752074150] [2021-02-19 17:53:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434210768] [2021-02-19 17:53:33,145 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:33,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:33,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:33,560 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 19 treesize of output 15 [2021-02-19 17:53:33,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:33,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:33,567 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 19 treesize of output 15 [2021-02-19 17:53:33,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:33,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:33,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:33,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:89 [2021-02-19 17:53:33,989 INFO L446 ElimStorePlain]: Different costs {0=[o_2, o_4, v_prenex_543, v_prenex_544], 1=[v_prenex_549, v_prenex_552, v_prenex_545, v_prenex_546]} [2021-02-19 17:53:33,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:33,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,245 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-02-19 17:53:34,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:34,246 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:53:34,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:34,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,503 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:53:34,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:34,504 INFO L518 ElimStorePlain]: Eliminatee v_prenex_544 vanished before elimination [2021-02-19 17:53:34,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:34,513 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 19 treesize of output 15 [2021-02-19 17:53:34,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,748 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:53:34,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:34,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-02-19 17:53:34,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:34,992 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 17:53:34,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:35,002 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 19 treesize of output 15 [2021-02-19 17:53:35,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:35,218 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:53:35,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:35,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:35,225 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 [2021-02-19 17:53:35,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:35,335 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 17:53:35,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:35,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:35,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:185, output treesize:67 [2021-02-19 17:53:35,559 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-02-19 17:53:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:35,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:35,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686936094] [2021-02-19 17:53:35,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:35,990 INFO L87 Difference]: Start difference. First operand 403 states and 1248 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:36,376 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 17:53:36,715 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 17:53:36,968 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-02-19 17:53:37,195 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 17:53:37,434 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-02-19 17:53:37,952 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 17:53:38,627 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 17:53:39,353 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:53:39,610 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-02-19 17:53:39,872 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:53:40,256 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:53:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:40,487 INFO L93 Difference]: Finished difference Result 751 states and 2234 transitions. [2021-02-19 17:53:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:53:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:40,491 INFO L225 Difference]: With dead ends: 751 [2021-02-19 17:53:40,491 INFO L226 Difference]: Without dead ends: 703 [2021-02-19 17:53:40,491 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:53:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-02-19 17:53:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 398. [2021-02-19 17:53:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.0780856423173804) internal successors, (1222), 397 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1222 transitions. [2021-02-19 17:53:40,497 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1222 transitions. Word has length 21 [2021-02-19 17:53:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:40,497 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1222 transitions. [2021-02-19 17:53:40,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1222 transitions. [2021-02-19 17:53:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:40,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:40,497 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:40,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:40,698 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1267802000, now seen corresponding path program 225 times [2021-02-19 17:53:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:40,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165277804] [2021-02-19 17:53:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165277804] [2021-02-19 17:53:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720216097] [2021-02-19 17:53:41,088 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:41,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:53:41,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:53:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:41,299 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_553]} [2021-02-19 17:53:41,303 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 9 treesize of output 7 [2021-02-19 17:53:41,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:41,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:41,343 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 17 treesize of output 13 [2021-02-19 17:53:41,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:41,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:41,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:41,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-02-19 17:53:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:41,665 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 19 treesize of output 15 [2021-02-19 17:53:41,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:41,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:41,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:41,709 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:53:41,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:41,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:41,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:53:41,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2021-02-19 17:53:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:41,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:41,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:53:41,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642476657] [2021-02-19 17:53:41,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:53:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:53:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:53:41,827 INFO L87 Difference]: Start difference. First operand 398 states and 1222 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:42,433 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:53:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:42,846 INFO L93 Difference]: Finished difference Result 542 states and 1635 transitions. [2021-02-19 17:53:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:53:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:42,850 INFO L225 Difference]: With dead ends: 542 [2021-02-19 17:53:42,850 INFO L226 Difference]: Without dead ends: 520 [2021-02-19 17:53:42,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:53:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-02-19 17:53:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 401. [2021-02-19 17:53:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.08) internal successors, (1232), 400 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1232 transitions. [2021-02-19 17:53:42,855 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1232 transitions. Word has length 21 [2021-02-19 17:53:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:42,855 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1232 transitions. [2021-02-19 17:53:42,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1232 transitions. [2021-02-19 17:53:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:42,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:42,856 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:43,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2767 [2021-02-19 17:53:43,058 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1074097152, now seen corresponding path program 226 times [2021-02-19 17:53:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295556601] [2021-02-19 17:53:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:43,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295556601] [2021-02-19 17:53:43,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668049702] [2021-02-19 17:53:43,278 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:43,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:53:43,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:53:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:43,636 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[v_prenex_554]} [2021-02-19 17:53:43,643 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 9 treesize of output 7 [2021-02-19 17:53:43,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:43,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:43,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:43,725 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 17 treesize of output 13 [2021-02-19 17:53:43,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:43,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:43,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:43,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:39 [2021-02-19 17:53:43,969 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 9 treesize of output 7 [2021-02-19 17:53:43,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:43,981 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 19 treesize of output 15 [2021-02-19 17:53:43,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:44,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:44,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:44,065 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 10 treesize of output 5 [2021-02-19 17:53:44,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:44,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:44,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:53:44,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:67, output treesize:21 [2021-02-19 17:53:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:44,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:44,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:53:44,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150983277] [2021-02-19 17:53:44,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:53:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:53:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:53:44,330 INFO L87 Difference]: Start difference. First operand 401 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:45,044 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:53:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:45,318 INFO L93 Difference]: Finished difference Result 557 states and 1684 transitions. [2021-02-19 17:53:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:53:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:45,321 INFO L225 Difference]: With dead ends: 557 [2021-02-19 17:53:45,321 INFO L226 Difference]: Without dead ends: 528 [2021-02-19 17:53:45,321 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:53:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-02-19 17:53:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 401. [2021-02-19 17:53:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.08) internal successors, (1232), 400 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1232 transitions. [2021-02-19 17:53:45,325 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1232 transitions. Word has length 21 [2021-02-19 17:53:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:45,325 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 1232 transitions. [2021-02-19 17:53:45,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1232 transitions. [2021-02-19 17:53:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:45,326 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:45,326 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:45,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-02-19 17:53:45,526 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1622932912, now seen corresponding path program 227 times [2021-02-19 17:53:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73888546] [2021-02-19 17:53:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:46,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73888546] [2021-02-19 17:53:46,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860859718] [2021-02-19 17:53:46,043 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:46,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:53:46,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:46,523 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_559, v_prenex_557], 1=[o_4, v_prenex_556]} [2021-02-19 17:53:46,530 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 9 treesize of output 7 [2021-02-19 17:53:46,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:46,758 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:53:46,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:53:46,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:46,987 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:53:46,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:46,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:46,997 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 17 treesize of output 13 [2021-02-19 17:53:47,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:47,119 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 17:53:47,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:47,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:47,125 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 17 treesize of output 13 [2021-02-19 17:53:47,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:47,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:47,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:53:47,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:157, output treesize:119 [2021-02-19 17:53:47,635 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 17:53:47,745 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:53:47,753 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 9 treesize of output 7 [2021-02-19 17:53:47,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:47,769 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 19 treesize of output 15 [2021-02-19 17:53:47,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:47,781 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 9 treesize of output 7 [2021-02-19 17:53:47,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:47,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:47,795 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 19 treesize of output 15 [2021-02-19 17:53:47,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:48,014 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:53:48,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:48,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:48,027 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 [2021-02-19 17:53:48,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:48,039 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 [2021-02-19 17:53:48,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:48,254 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:53:48,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:48,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:48,259 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:165, output treesize:60 [2021-02-19 17:53:48,442 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-02-19 17:53:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:48,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:48,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690938070] [2021-02-19 17:53:48,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:48,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:48,674 INFO L87 Difference]: Start difference. First operand 401 states and 1232 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:49,010 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 17:53:49,363 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 17:53:49,654 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 17:53:49,853 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-02-19 17:53:50,143 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 17:53:50,700 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:53:51,105 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 17:53:51,420 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 17:53:51,627 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:53:52,212 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 17:53:52,735 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 17:53:53,162 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 17:53:53,579 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-02-19 17:53:54,108 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-02-19 17:53:54,560 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 17:53:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:53:54,838 INFO L93 Difference]: Finished difference Result 855 states and 2555 transitions. [2021-02-19 17:53:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:53:54,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:53:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:53:54,842 INFO L225 Difference]: With dead ends: 855 [2021-02-19 17:53:54,842 INFO L226 Difference]: Without dead ends: 807 [2021-02-19 17:53:54,843 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:53:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-02-19 17:53:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 415. [2021-02-19 17:53:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.103864734299517) internal successors, (1285), 414 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1285 transitions. [2021-02-19 17:53:54,849 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1285 transitions. Word has length 21 [2021-02-19 17:53:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:53:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1285 transitions. [2021-02-19 17:53:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1285 transitions. [2021-02-19 17:53:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:53:54,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:53:54,850 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:53:55,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:55,050 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:53:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:53:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash -973344247, now seen corresponding path program 228 times [2021-02-19 17:53:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:53:55,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559743388] [2021-02-19 17:53:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:53:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:53:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:55,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559743388] [2021-02-19 17:53:55,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573441052] [2021-02-19 17:53:55,397 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:53:55,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:53:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:53:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:53:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:53:55,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:55,815 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 19 treesize of output 15 [2021-02-19 17:53:55,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:55,945 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:53:55,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:55,954 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 19 treesize of output 15 [2021-02-19 17:53:55,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,075 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:53:56,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:56,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-02-19 17:53:56,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-02-19 17:53:56,405 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:53:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:56,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,430 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 19 treesize of output 15 [2021-02-19 17:53:56,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:53:56,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,457 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 19 treesize of output 15 [2021-02-19 17:53:56,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,681 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:53:56,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,694 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 [2021-02-19 17:53:56,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:53:56,706 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 [2021-02-19 17:53:56,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:53:56,931 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 17:53:56,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:53:56,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:53:56,935 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:157, output treesize:60 [2021-02-19 17:53:57,123 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-02-19 17:53:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:53:57,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:53:57,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:53:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550722669] [2021-02-19 17:53:57,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:53:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:53:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:53:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:53:57,514 INFO L87 Difference]: Start difference. First operand 415 states and 1285 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:53:57,890 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 17:53:58,055 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 17:53:58,343 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 17:53:58,514 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 17:53:58,761 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 17:53:58,916 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 17:53:59,156 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 17:54:00,109 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 17:54:00,502 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 17:54:00,672 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-02-19 17:54:01,143 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:54:01,560 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-02-19 17:54:01,898 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 17:54:02,284 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:54:02,770 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:54:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:03,017 INFO L93 Difference]: Finished difference Result 788 states and 2359 transitions. [2021-02-19 17:54:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:54:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:03,021 INFO L225 Difference]: With dead ends: 788 [2021-02-19 17:54:03,021 INFO L226 Difference]: Without dead ends: 746 [2021-02-19 17:54:03,021 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:54:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-02-19 17:54:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 414. [2021-02-19 17:54:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.096852300242131) internal successors, (1279), 413 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1279 transitions. [2021-02-19 17:54:03,027 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1279 transitions. Word has length 21 [2021-02-19 17:54:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:03,027 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1279 transitions. [2021-02-19 17:54:03,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1279 transitions. [2021-02-19 17:54:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:03,028 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:03,028 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:03,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:03,228 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1437082090, now seen corresponding path program 229 times [2021-02-19 17:54:03,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:03,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355049057] [2021-02-19 17:54:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355049057] [2021-02-19 17:54:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520090211] [2021-02-19 17:54:03,712 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:04,004 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_565, v_prenex_567], 1=[o_4, v_prenex_564]} [2021-02-19 17:54:04,011 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 9 treesize of output 7 [2021-02-19 17:54:04,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,248 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:54:04,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:04,256 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 9 treesize of output 7 [2021-02-19 17:54:04,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,470 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:54:04,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:04,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:04,479 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 17 treesize of output 13 [2021-02-19 17:54:04,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,697 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 17:54:04,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:04,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:04,706 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 17 treesize of output 13 [2021-02-19 17:54:04,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:04,918 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 17:54:04,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:04,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:54:04,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:157, output treesize:119 [2021-02-19 17:54:05,361 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 17:54:05,626 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-02-19 17:54:05,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,635 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 19 treesize of output 15 [2021-02-19 17:54:05,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,647 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 19 treesize of output 15 [2021-02-19 17:54:05,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:05,769 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:54:05,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:05,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,779 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 [2021-02-19 17:54:05,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:05,791 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 [2021-02-19 17:54:05,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:05,914 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:54:05,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:05,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:05,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-02-19 17:54:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:06,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:06,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238186357] [2021-02-19 17:54:06,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:06,154 INFO L87 Difference]: Start difference. First operand 414 states and 1279 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:06,454 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 17:54:07,019 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 17:54:07,436 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 17:54:07,813 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:54:08,287 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-02-19 17:54:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:08,444 INFO L93 Difference]: Finished difference Result 634 states and 1908 transitions. [2021-02-19 17:54:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:54:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:08,446 INFO L225 Difference]: With dead ends: 634 [2021-02-19 17:54:08,446 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 17:54:08,446 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:54:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 17:54:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 402. [2021-02-19 17:54:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.084788029925187) internal successors, (1237), 401 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1237 transitions. [2021-02-19 17:54:08,451 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1237 transitions. Word has length 21 [2021-02-19 17:54:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:08,451 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1237 transitions. [2021-02-19 17:54:08,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1237 transitions. [2021-02-19 17:54:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:08,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:08,451 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:08,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2799 [2021-02-19 17:54:08,666 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash 329184080, now seen corresponding path program 230 times [2021-02-19 17:54:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:08,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257556707] [2021-02-19 17:54:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:08,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257556707] [2021-02-19 17:54:08,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262023756] [2021-02-19 17:54:08,912 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:08,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:08,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:09,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:09,228 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 17 treesize of output 13 [2021-02-19 17:54:09,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:09,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:09,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:09,244 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 17 treesize of output 13 [2021-02-19 17:54:09,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:09,256 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 9 treesize of output 7 [2021-02-19 17:54:09,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:09,268 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 9 treesize of output 7 [2021-02-19 17:54:09,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:09,422 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-19 17:54:09,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:09,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:54:09,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:69 [2021-02-19 17:54:09,636 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:54:10,291 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_573], 1=[o_4, v_prenex_574]} [2021-02-19 17:54:10,299 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 19 treesize of output 15 [2021-02-19 17:54:10,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:10,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:10,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 17:54:10,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:10,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:10,460 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 10 treesize of output 5 [2021-02-19 17:54:10,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:10,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:10,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:10,548 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 20 treesize of output 9 [2021-02-19 17:54:10,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:10,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:10,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:10,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:67, output treesize:25 [2021-02-19 17:54:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:10,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:10,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424454598] [2021-02-19 17:54:10,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:10,866 INFO L87 Difference]: Start difference. First operand 402 states and 1237 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:11,777 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-02-19 17:54:12,150 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 17:54:12,957 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 17:54:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:13,220 INFO L93 Difference]: Finished difference Result 759 states and 2239 transitions. [2021-02-19 17:54:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:54:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:13,222 INFO L225 Difference]: With dead ends: 759 [2021-02-19 17:54:13,222 INFO L226 Difference]: Without dead ends: 715 [2021-02-19 17:54:13,222 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:54:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-02-19 17:54:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 410. [2021-02-19 17:54:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.0929095354523226) internal successors, (1265), 409 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1265 transitions. [2021-02-19 17:54:13,230 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1265 transitions. Word has length 21 [2021-02-19 17:54:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:13,230 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1265 transitions. [2021-02-19 17:54:13,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1265 transitions. [2021-02-19 17:54:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:13,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:13,231 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:13,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2808,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:13,446 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1565093598, now seen corresponding path program 231 times [2021-02-19 17:54:13,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:13,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467723188] [2021-02-19 17:54:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:13,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467723188] [2021-02-19 17:54:13,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62581551] [2021-02-19 17:54:13,817 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:13,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:54:13,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:13,919 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 19 treesize of output 15 [2021-02-19 17:54:13,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:13,930 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 19 treesize of output 15 [2021-02-19 17:54:13,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:14,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:14,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-02-19 17:54:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:54:14,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,495 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 19 treesize of output 15 [2021-02-19 17:54:14,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:54:14,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:54:14,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:14,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:14,555 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:14,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:54:14,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:89, output treesize:16 [2021-02-19 17:54:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:54:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180252299] [2021-02-19 17:54:14,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:54:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:54:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:54:14,762 INFO L87 Difference]: Start difference. First operand 410 states and 1265 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:15,920 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 17:54:16,383 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:54:16,723 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 17:54:16,935 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-19 17:54:17,478 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 17:54:17,730 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:54:18,340 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:54:18,636 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:54:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:18,929 INFO L93 Difference]: Finished difference Result 811 states and 2456 transitions. [2021-02-19 17:54:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:54:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21 [2021-02-19 17:54:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:18,934 INFO L225 Difference]: With dead ends: 811 [2021-02-19 17:54:18,934 INFO L226 Difference]: Without dead ends: 739 [2021-02-19 17:54:18,934 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:54:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-02-19 17:54:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 411. [2021-02-19 17:54:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.0902439024390245) internal successors, (1267), 410 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1267 transitions. [2021-02-19 17:54:18,940 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1267 transitions. Word has length 21 [2021-02-19 17:54:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:18,940 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1267 transitions. [2021-02-19 17:54:18,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1267 transitions. [2021-02-19 17:54:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:18,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:18,941 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:19,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2826,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:19,157 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1631522023, now seen corresponding path program 232 times [2021-02-19 17:54:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:19,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209101540] [2021-02-19 17:54:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209101540] [2021-02-19 17:54:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553835577] [2021-02-19 17:54:19,528 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:19,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:19,653 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 17 treesize of output 13 [2021-02-19 17:54:19,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:19,665 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 9 treesize of output 7 [2021-02-19 17:54:19,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:19,676 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 9 treesize of output 7 [2021-02-19 17:54:19,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:19,687 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 17 treesize of output 13 [2021-02-19 17:54:19,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:19,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:19,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:54:19,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-02-19 17:54:20,100 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 26 treesize of output 20 [2021-02-19 17:54:20,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:20,111 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 19 treesize of output 15 [2021-02-19 17:54:20,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:20,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:20,157 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:20,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:20,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-02-19 17:54:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:20,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:54:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673826196] [2021-02-19 17:54:20,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:54:20,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:54:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:54:20,363 INFO L87 Difference]: Start difference. First operand 411 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:20,720 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:21,166 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:21,315 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:21,972 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:22,220 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:54:22,718 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:54:23,017 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-02-19 17:54:23,302 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 17:54:23,562 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-02-19 17:54:23,969 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:54:24,338 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:54:24,667 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 17:54:24,989 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:25,277 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 17:54:25,681 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 17:54:26,137 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 17:54:26,543 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:54:27,073 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 17:54:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:27,112 INFO L93 Difference]: Finished difference Result 1145 states and 3427 transitions. [2021-02-19 17:54:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:54:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21 [2021-02-19 17:54:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:27,115 INFO L225 Difference]: With dead ends: 1145 [2021-02-19 17:54:27,115 INFO L226 Difference]: Without dead ends: 1088 [2021-02-19 17:54:27,115 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:54:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-02-19 17:54:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 417. [2021-02-19 17:54:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.0961538461538463) internal successors, (1288), 416 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1288 transitions. [2021-02-19 17:54:27,121 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1288 transitions. Word has length 21 [2021-02-19 17:54:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:27,121 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1288 transitions. [2021-02-19 17:54:27,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1288 transitions. [2021-02-19 17:54:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:27,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:27,122 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:27,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2833 [2021-02-19 17:54:27,322 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1489240445, now seen corresponding path program 233 times [2021-02-19 17:54:27,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:27,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793573374] [2021-02-19 17:54:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:27,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793573374] [2021-02-19 17:54:27,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972119015] [2021-02-19 17:54:27,694 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:27,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:54:27,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:27,816 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 17 treesize of output 13 [2021-02-19 17:54:27,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:27,827 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 9 treesize of output 7 [2021-02-19 17:54:27,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:27,838 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 9 treesize of output 7 [2021-02-19 17:54:27,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:27,848 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 17 treesize of output 13 [2021-02-19 17:54:27,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:27,966 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-02-19 17:54:27,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:27,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:54:27,971 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-02-19 17:54:28,131 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-02-19 17:54:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-02-19 17:54:28,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:28,518 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 19 treesize of output 15 [2021-02-19 17:54:28,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:28,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:28,565 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:28,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:28,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-02-19 17:54:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:28,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:28,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:54:28,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812271740] [2021-02-19 17:54:28,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:54:28,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:54:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:54:28,797 INFO L87 Difference]: Start difference. First operand 417 states and 1288 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:29,266 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:54:29,670 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-02-19 17:54:29,865 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:30,354 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:54:30,676 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 17:54:31,077 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:31,538 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:54:31,899 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 17:54:32,288 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:32,685 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 17:54:32,911 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 17:54:33,478 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:54:33,815 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:54:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:34,040 INFO L93 Difference]: Finished difference Result 1030 states and 3126 transitions. [2021-02-19 17:54:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:54:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21 [2021-02-19 17:54:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:34,044 INFO L225 Difference]: With dead ends: 1030 [2021-02-19 17:54:34,045 INFO L226 Difference]: Without dead ends: 992 [2021-02-19 17:54:34,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:54:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-02-19 17:54:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 427. [2021-02-19 17:54:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-02-19 17:54:34,052 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 21 [2021-02-19 17:54:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:34,052 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-02-19 17:54:34,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-02-19 17:54:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:34,052 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:34,052 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:34,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2841,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:34,253 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2092043801, now seen corresponding path program 234 times [2021-02-19 17:54:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:34,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173418973] [2021-02-19 17:54:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:34,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173418973] [2021-02-19 17:54:34,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077102004] [2021-02-19 17:54:34,633 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:34,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:54:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:34,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:34,756 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 17 treesize of output 13 [2021-02-19 17:54:34,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:34,768 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 9 treesize of output 7 [2021-02-19 17:54:34,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:34,779 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 9 treesize of output 7 [2021-02-19 17:54:34,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:34,789 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 17 treesize of output 13 [2021-02-19 17:54:34,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:34,907 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-02-19 17:54:34,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:34,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:54:34,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:89, output treesize:57 [2021-02-19 17:54:35,061 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-02-19 17:54:35,267 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 9 treesize of output 7 [2021-02-19 17:54:35,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:35,274 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 26 treesize of output 20 [2021-02-19 17:54:35,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:35,280 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 19 treesize of output 15 [2021-02-19 17:54:35,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:35,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:35,309 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:35,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:54:35,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:69, output treesize:26 [2021-02-19 17:54:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:35,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:35,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:54:35,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68291440] [2021-02-19 17:54:35,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:54:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:54:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:54:35,539 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:36,262 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:54:36,834 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-02-19 17:54:37,057 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:37,597 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:54:37,767 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 17:54:38,015 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:38,210 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:54:38,754 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:54:39,056 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 17:54:39,972 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:54:40,333 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:54:40,964 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 17:54:41,337 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 17:54:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:41,686 INFO L93 Difference]: Finished difference Result 1166 states and 3525 transitions. [2021-02-19 17:54:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:54:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21 [2021-02-19 17:54:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:41,690 INFO L225 Difference]: With dead ends: 1166 [2021-02-19 17:54:41,690 INFO L226 Difference]: Without dead ends: 1120 [2021-02-19 17:54:41,691 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:54:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-02-19 17:54:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 430. [2021-02-19 17:54:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.125874125874126) internal successors, (1341), 429 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1341 transitions. [2021-02-19 17:54:41,699 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1341 transitions. Word has length 21 [2021-02-19 17:54:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:41,699 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1341 transitions. [2021-02-19 17:54:41,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2021-02-19 17:54:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1341 transitions. [2021-02-19 17:54:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:41,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:41,699 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:41,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2851 [2021-02-19 17:54:41,900 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1650622328, now seen corresponding path program 235 times [2021-02-19 17:54:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:41,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438291966] [2021-02-19 17:54:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:42,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438291966] [2021-02-19 17:54:42,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758409706] [2021-02-19 17:54:42,184 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:54:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:42,257 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 17 treesize of output 13 [2021-02-19 17:54:42,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:42,262 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 9 treesize of output 7 [2021-02-19 17:54:42,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:42,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:42,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:42,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:54:42,409 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 19 treesize of output 15 [2021-02-19 17:54:42,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:42,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:42,426 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:42,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:42,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:54:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:42,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:42,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:54:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729935434] [2021-02-19 17:54:42,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:54:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:54:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:54:42,483 INFO L87 Difference]: Start difference. First operand 430 states and 1341 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:43,294 INFO L93 Difference]: Finished difference Result 700 states and 2145 transitions. [2021-02-19 17:54:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:54:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:43,297 INFO L225 Difference]: With dead ends: 700 [2021-02-19 17:54:43,297 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 17:54:43,298 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:54:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 17:54:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 433. [2021-02-19 17:54:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.122685185185185) internal successors, (1349), 432 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1349 transitions. [2021-02-19 17:54:43,303 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1349 transitions. Word has length 21 [2021-02-19 17:54:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:43,303 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1349 transitions. [2021-02-19 17:54:43,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1349 transitions. [2021-02-19 17:54:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:43,304 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:43,304 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:43,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-02-19 17:54:43,504 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -763592030, now seen corresponding path program 236 times [2021-02-19 17:54:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:43,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162259437] [2021-02-19 17:54:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:43,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162259437] [2021-02-19 17:54:43,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769345556] [2021-02-19 17:54:43,789 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:43,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:43,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,007 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 17 treesize of output 13 [2021-02-19 17:54:44,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:44,015 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 17 treesize of output 13 [2021-02-19 17:54:44,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:54:44,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,028 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 9 treesize of output 7 [2021-02-19 17:54:44,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:44,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:44,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-02-19 17:54:44,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:69 [2021-02-19 17:54:44,299 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:54:44,932 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_581, v_prenex_582, v_prenex_579], 1=[v_prenex_580, o_4]} [2021-02-19 17:54:44,939 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 26 treesize of output 20 [2021-02-19 17:54:44,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:45,046 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:54:45,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:45,055 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 9 treesize of output 7 [2021-02-19 17:54:45,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:45,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:45,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_582 vanished before elimination [2021-02-19 17:54:45,160 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 19 treesize of output 15 [2021-02-19 17:54:45,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:45,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:45,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:45,263 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 10 treesize of output 5 [2021-02-19 17:54:45,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:45,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:45,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:54:45,367 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 20 treesize of output 9 [2021-02-19 17:54:45,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:45,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:45,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:54:45,462 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:81, output treesize:30 [2021-02-19 17:54:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:45,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:45,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 17:54:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657840625] [2021-02-19 17:54:45,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:54:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:54:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:54:45,832 INFO L87 Difference]: Start difference. First operand 433 states and 1349 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:46,508 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 17:54:46,776 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-02-19 17:54:47,262 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 17:54:47,687 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 17:54:47,951 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:54:48,533 WARN L202 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-02-19 17:54:48,781 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 17:54:48,928 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:54:49,593 WARN L202 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 17:54:50,022 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 17:54:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:50,388 INFO L93 Difference]: Finished difference Result 919 states and 2717 transitions. [2021-02-19 17:54:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:54:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:50,393 INFO L225 Difference]: With dead ends: 919 [2021-02-19 17:54:50,394 INFO L226 Difference]: Without dead ends: 832 [2021-02-19 17:54:50,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:54:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-02-19 17:54:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 424. [2021-02-19 17:54:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1134751773049647) internal successors, (1317), 423 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1317 transitions. [2021-02-19 17:54:50,400 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1317 transitions. Word has length 21 [2021-02-19 17:54:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:50,400 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1317 transitions. [2021-02-19 17:54:50,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1317 transitions. [2021-02-19 17:54:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:50,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:50,401 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:50,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2866 [2021-02-19 17:54:50,601 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -844065584, now seen corresponding path program 237 times [2021-02-19 17:54:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320526234] [2021-02-19 17:54:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:50,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320526234] [2021-02-19 17:54:50,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887788574] [2021-02-19 17:54:50,917 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:50,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:54:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:54:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:51,108 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 17 treesize of output 13 [2021-02-19 17:54:51,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:51,118 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 9 treesize of output 7 [2021-02-19 17:54:51,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:51,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:51,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:51,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:54:51,271 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 19 treesize of output 15 [2021-02-19 17:54:51,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:51,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:51,288 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:51,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:54:51,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-02-19 17:54:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:51,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:51,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:54:51,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942472731] [2021-02-19 17:54:51,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:54:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:54:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:54:51,346 INFO L87 Difference]: Start difference. First operand 424 states and 1317 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:51,921 INFO L93 Difference]: Finished difference Result 547 states and 1672 transitions. [2021-02-19 17:54:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:54:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:51,923 INFO L225 Difference]: With dead ends: 547 [2021-02-19 17:54:51,923 INFO L226 Difference]: Without dead ends: 525 [2021-02-19 17:54:51,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:54:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-02-19 17:54:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 431. [2021-02-19 17:54:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2021-02-19 17:54:51,928 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 21 [2021-02-19 17:54:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:51,928 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2021-02-19 17:54:51,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2021-02-19 17:54:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:51,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:51,929 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:52,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2885,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:52,129 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash -419993674, now seen corresponding path program 238 times [2021-02-19 17:54:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107594716] [2021-02-19 17:54:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107594716] [2021-02-19 17:54:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840268713] [2021-02-19 17:54:52,540 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:52,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:54:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:52,707 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 19 treesize of output 15 [2021-02-19 17:54:52,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:52,717 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 19 treesize of output 15 [2021-02-19 17:54:52,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:52,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:52,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:52,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:54:53,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:54:53,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:53,107 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 19 treesize of output 15 [2021-02-19 17:54:53,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:53,119 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 28 treesize of output 22 [2021-02-19 17:54:53,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:53,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:54:53,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:53,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:53,170 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:53,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:54:53,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:89, output treesize:16 [2021-02-19 17:54:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:53,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:53,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:54:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278804499] [2021-02-19 17:54:53,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:54:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:54:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:54:53,376 INFO L87 Difference]: Start difference. First operand 431 states and 1340 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:54:53,701 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:54:54,468 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:54:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:54,664 INFO L93 Difference]: Finished difference Result 707 states and 2135 transitions. [2021-02-19 17:54:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:54:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 21 [2021-02-19 17:54:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:54,668 INFO L225 Difference]: With dead ends: 707 [2021-02-19 17:54:54,668 INFO L226 Difference]: Without dead ends: 641 [2021-02-19 17:54:54,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:54:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-02-19 17:54:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 432. [2021-02-19 17:54:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.11368909512761) internal successors, (1342), 431 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1342 transitions. [2021-02-19 17:54:54,673 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1342 transitions. Word has length 21 [2021-02-19 17:54:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:54,673 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1342 transitions. [2021-02-19 17:54:54,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:54:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1342 transitions. [2021-02-19 17:54:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:54,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:54,674 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:54,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2888,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:54,878 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1036687354, now seen corresponding path program 239 times [2021-02-19 17:54:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:54,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746508971] [2021-02-19 17:54:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:55,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746508971] [2021-02-19 17:54:55,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140353688] [2021-02-19 17:54:55,206 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:55,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:54:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:54:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:54:55,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,399 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 9 treesize of output 7 [2021-02-19 17:54:55,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:55,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:55,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:54:55,545 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 9 treesize of output 7 [2021-02-19 17:54:55,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:55,594 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:55,599 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 19 treesize of output 15 [2021-02-19 17:54:55,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:55,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:55,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_584 vanished before elimination [2021-02-19 17:54:55,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:55,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:15 [2021-02-19 17:54:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:55,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:55,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:54:55,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827464747] [2021-02-19 17:54:55,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:54:55,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:54:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:54:55,782 INFO L87 Difference]: Start difference. First operand 432 states and 1342 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:54:56,373 INFO L93 Difference]: Finished difference Result 585 states and 1792 transitions. [2021-02-19 17:54:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:54:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:54:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:54:56,378 INFO L225 Difference]: With dead ends: 585 [2021-02-19 17:54:56,378 INFO L226 Difference]: Without dead ends: 556 [2021-02-19 17:54:56,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:54:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-02-19 17:54:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 432. [2021-02-19 17:54:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.11368909512761) internal successors, (1342), 431 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1342 transitions. [2021-02-19 17:54:56,383 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1342 transitions. Word has length 21 [2021-02-19 17:54:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:54:56,383 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1342 transitions. [2021-02-19 17:54:56,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:54:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1342 transitions. [2021-02-19 17:54:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:54:56,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:54:56,384 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:54:56,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-02-19 17:54:56,584 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:54:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:54:56,584 INFO L82 PathProgramCache]: Analyzing trace with hash -58011564, now seen corresponding path program 240 times [2021-02-19 17:54:56,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:54:56,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228370170] [2021-02-19 17:54:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:54:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:54:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228370170] [2021-02-19 17:54:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014358505] [2021-02-19 17:54:56,995 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:54:57,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:54:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:54:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:54:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:54:57,160 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 19 treesize of output 15 [2021-02-19 17:54:57,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:57,170 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 19 treesize of output 15 [2021-02-19 17:54:57,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:57,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:54:57,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-02-19 17:54:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:54:57,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:57,727 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 17:54:57,728 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-02-19 17:54:57,734 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 19 treesize of output 15 [2021-02-19 17:54:57,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:57,874 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:54:57,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:57,875 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:54:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-02-19 17:54:57,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:58,138 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 17:54:58,139 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.8 percent of original size [2021-02-19 17:54:58,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-02-19 17:54:58,145 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 19 treesize of output 15 [2021-02-19 17:54:58,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:54:58,260 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 17:54:58,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:54:58,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_588 vanished before elimination [2021-02-19 17:54:58,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-02-19 17:54:58,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:54:58,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:101, output treesize:45 [2021-02-19 17:54:58,423 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 17:54:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:54:58,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:54:58,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:54:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384124721] [2021-02-19 17:54:58,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:54:58,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:54:58,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:54:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:54:58,611 INFO L87 Difference]: Start difference. First operand 432 states and 1342 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:54:58,880 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 17:54:59,236 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:55:00,399 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-02-19 17:55:00,804 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 17:55:01,185 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-02-19 17:55:01,429 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 17:55:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:01,627 INFO L93 Difference]: Finished difference Result 759 states and 2273 transitions. [2021-02-19 17:55:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:55:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 21 [2021-02-19 17:55:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:01,632 INFO L225 Difference]: With dead ends: 759 [2021-02-19 17:55:01,632 INFO L226 Difference]: Without dead ends: 684 [2021-02-19 17:55:01,633 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:55:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-02-19 17:55:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 433. [2021-02-19 17:55:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.136574074074074) internal successors, (1355), 432 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1355 transitions. [2021-02-19 17:55:01,639 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1355 transitions. Word has length 21 [2021-02-19 17:55:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:01,639 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1355 transitions. [2021-02-19 17:55:01,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:55:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1355 transitions. [2021-02-19 17:55:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:55:01,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:01,639 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2899,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:01,840 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1151495822, now seen corresponding path program 241 times [2021-02-19 17:55:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185200159] [2021-02-19 17:55:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:02,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185200159] [2021-02-19 17:55:02,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056234970] [2021-02-19 17:55:02,119 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:55:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:02,291 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 19 treesize of output 15 [2021-02-19 17:55:02,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:02,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-02-19 17:55:02,406 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 14 [2021-02-19 17:55:02,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-02-19 17:55:02,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:02,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:02,456 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:55:02,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:02,459 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-02-19 17:55:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:02,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:55:02,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39353326] [2021-02-19 17:55:02,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:55:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:55:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:55:02,608 INFO L87 Difference]: Start difference. First operand 433 states and 1355 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:03,624 INFO L93 Difference]: Finished difference Result 566 states and 1738 transitions. [2021-02-19 17:55:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:55:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:55:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:03,628 INFO L225 Difference]: With dead ends: 566 [2021-02-19 17:55:03,628 INFO L226 Difference]: Without dead ends: 530 [2021-02-19 17:55:03,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:55:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-02-19 17:55:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 436. [2021-02-19 17:55:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1379310344827585) internal successors, (1365), 435 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1365 transitions. [2021-02-19 17:55:03,634 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1365 transitions. Word has length 21 [2021-02-19 17:55:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:03,634 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 1365 transitions. [2021-02-19 17:55:03,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1365 transitions. [2021-02-19 17:55:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:55:03,634 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:03,634 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:03,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:03,835 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2048772556, now seen corresponding path program 242 times [2021-02-19 17:55:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:03,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180964823] [2021-02-19 17:55:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180964823] [2021-02-19 17:55:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768535283] [2021-02-19 17:55:04,150 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:04,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:55:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:04,323 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 17 treesize of output 13 [2021-02-19 17:55:04,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-02-19 17:55:04,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:04,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:04,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:55:04,486 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 19 treesize of output 15 [2021-02-19 17:55:04,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:55:04,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,639 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-02-19 17:55:04,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:04,641 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:55:04,647 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 9 treesize of output 7 [2021-02-19 17:55:04,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,660 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 9 treesize of output 7 [2021-02-19 17:55:04,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:04,781 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 17:55:04,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:04,783 INFO L518 ElimStorePlain]: Eliminatee v_prenex_592 vanished before elimination [2021-02-19 17:55:04,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:55:04,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:45 [2021-02-19 17:55:04,944 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 17:55:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:05,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:05,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:55:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590710795] [2021-02-19 17:55:05,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:55:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:55:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:55:05,201 INFO L87 Difference]: Start difference. First operand 436 states and 1365 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:55:05,575 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 17:55:06,679 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-02-19 17:55:07,018 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-02-19 17:55:07,402 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-02-19 17:55:07,806 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:55:08,259 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 17:55:08,425 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-02-19 17:55:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:08,426 INFO L93 Difference]: Finished difference Result 818 states and 2441 transitions. [2021-02-19 17:55:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:55:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 21 [2021-02-19 17:55:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:08,427 INFO L225 Difference]: With dead ends: 818 [2021-02-19 17:55:08,427 INFO L226 Difference]: Without dead ends: 743 [2021-02-19 17:55:08,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:55:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-02-19 17:55:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 456. [2021-02-19 17:55:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.158241758241758) internal successors, (1437), 455 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1437 transitions. [2021-02-19 17:55:08,434 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1437 transitions. Word has length 21 [2021-02-19 17:55:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:08,434 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 1437 transitions. [2021-02-19 17:55:08,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:55:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1437 transitions. [2021-02-19 17:55:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:55:08,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:08,435 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:08,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2909 [2021-02-19 17:55:08,635 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash -365441802, now seen corresponding path program 243 times [2021-02-19 17:55:08,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:08,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942890493] [2021-02-19 17:55:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:09,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942890493] [2021-02-19 17:55:09,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508034826] [2021-02-19 17:55:09,021 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:09,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:55:09,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:55:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:55:09,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:09,224 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 9 treesize of output 7 [2021-02-19 17:55:09,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:09,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:09,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:09,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-02-19 17:55:09,407 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 19 treesize of output 15 [2021-02-19 17:55:09,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:09,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:09,424 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:55:09,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:09,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-02-19 17:55:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:09,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:09,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:55:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839234994] [2021-02-19 17:55:09,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:55:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:55:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:55:09,578 INFO L87 Difference]: Start difference. First operand 456 states and 1437 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:55:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:10,689 INFO L93 Difference]: Finished difference Result 672 states and 2019 transitions. [2021-02-19 17:55:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:55:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 21 [2021-02-19 17:55:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:10,694 INFO L225 Difference]: With dead ends: 672 [2021-02-19 17:55:10,694 INFO L226 Difference]: Without dead ends: 630 [2021-02-19 17:55:10,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-02-19 17:55:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 446. [2021-02-19 17:55:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.150561797752809) internal successors, (1402), 445 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1402 transitions. [2021-02-19 17:55:10,699 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1402 transitions. Word has length 21 [2021-02-19 17:55:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:10,700 INFO L480 AbstractCegarLoop]: Abstraction has 446 states and 1402 transitions. [2021-02-19 17:55:10,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) [2021-02-19 17:55:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1402 transitions. [2021-02-19 17:55:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:55:10,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:10,700 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:10,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:10,905 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:55:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1633743991, now seen corresponding path program 244 times [2021-02-19 17:55:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054649895] [2021-02-19 17:55:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054649895] [2021-02-19 17:55:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602751407] [2021-02-19 17:55:11,298 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:11,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:55:11,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:55:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:11,509 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 17 treesize of output 13 [2021-02-19 17:55:11,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:11,515 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 17 treesize of output 13 [2021-02-19 17:55:11,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:11,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:11,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:11,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-02-19 17:55:11,803 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 26 treesize of output 20 [2021-02-19 17:55:11,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:11,816 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 19 treesize of output 15 [2021-02-19 17:55:11,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:11,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:11,866 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-02-19 17:55:11,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 17:55:11,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:21 [2021-02-19 17:55:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:12,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:12,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 17:55:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323024659] [2021-02-19 17:55:12,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:55:12,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:55:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:55:12,111 INFO L87 Difference]: Start difference. First operand 446 states and 1402 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:12,893 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 Received shutdown request... [2021-02-19 17:55:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:55:14,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-02-19 17:55:14,334 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:55:14,338 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:55:14,338 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:55:14 BasicIcfg [2021-02-19 17:55:14,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:55:14,338 INFO L168 Benchmark]: Toolchain (without parser) took 567219.69 ms. Allocated memory was 255.9 MB in the beginning and 463.5 MB in the end (delta: 207.6 MB). Free memory was 236.5 MB in the beginning and 305.4 MB in the end (delta: -68.9 MB). Peak memory consumption was 139.8 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:14,339 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:55:14,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 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. [2021-02-19 17:55:14,339 INFO L168 Benchmark]: Boogie Preprocessor took 16.24 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: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:14,339 INFO L168 Benchmark]: RCFGBuilder took 362.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 226.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:14,339 INFO L168 Benchmark]: TraceAbstraction took 566816.28 ms. Allocated memory was 255.9 MB in the beginning and 463.5 MB in the end (delta: 207.6 MB). Free memory was 225.8 MB in the beginning and 305.4 MB in the end (delta: -79.6 MB). Peak memory consumption was 127.9 MB. Max. memory is 16.0 GB. [2021-02-19 17:55:14,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 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 16.24 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: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 362.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 226.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 566816.28 ms. Allocated memory was 255.9 MB in the beginning and 463.5 MB in the end (delta: 207.6 MB). Free memory was 225.8 MB in the beginning and 305.4 MB in the end (delta: -79.6 MB). Peak memory consumption was 127.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 106]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 106). Cancelled while BasicCegarLoop was constructing difference of abstraction (446states) and FLOYD_HOARE automaton (currently 19 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 31 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 566.7s, OverallIterations: 256, TraceHistogramMax: 2, AutomataDifference: 285.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14913 SDtfs, 17260 SDslu, 88035 SDs, 0 SdLazy, 118141 SolverSat, 7381 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8980 GetRequests, 3088 SyntacticMatches, 604 SemanticMatches, 5287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28819 ImplicationChecksByTransitivity, 257.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=456occurred in iteration=254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 255 MinimizatonAttempts, 47516 StatesRemovedByMinimization, 251 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 223.4s InterpolantComputationTime, 10091 NumberOfCodeBlocks, 10091 NumberOfCodeBlocksAsserted, 740 NumberOfCheckSat, 9591 ConstructedInterpolants, 497 QuantifiedInterpolants, 3052388 SizeOfPredicates, 2721 NumberOfNonLiveVariables, 20149 ConjunctsInSsa, 5240 ConjunctsInUnsatCore, 500 InterpolantComputations, 12 PerfectInterpolantSequences, 126/1701 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