/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:04:37,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:04:37,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:04:37,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:04:37,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 19:04:37,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 19:04:37,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 19:04:37,926 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 19:04:37,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:04:37,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:04:37,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:04:37,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:04:37,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:04:37,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:04:37,960 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:04:37,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:04:37,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:04:37,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:04:37,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:04:37,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:04:37,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:04:37,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:04:37,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:04:37,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:04:37,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:04:37,963 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:04:37,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:04:37,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:04:38,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:04:38,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:04:38,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:04:38,211 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:04:38,211 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:04:38,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-02-19 19:04:38,212 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-02-19 19:04:38,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:04:38,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:04:38,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:04:38,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:04:38,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:04:38,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:04:38,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:04:38,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:04:38,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:04:38,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/1) ... [2021-02-19 19:04:38,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:04:38,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:04:38,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:04:38,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:04:38,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (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 19:04:38,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:04:38,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:04:38,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:04:38,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:04:38,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:04:38,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:04:38,363 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:04:38,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:04:38,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:04:38,364 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:04:38,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:04:38,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:04:38,364 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 19:04:38,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:04:38,551 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:04:38,552 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:04:38 BoogieIcfgContainer [2021-02-19 19:04:38,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:04:38,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:04:38,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:04:38,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:04:38,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:04:38" (1/2) ... [2021-02-19 19:04:38,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c2c6b and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:04:38, skipping insertion in model container [2021-02-19 19:04:38,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:04:38" (2/2) ... [2021-02-19 19:04:38,556 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-02-19 19:04:38,560 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:04:38,560 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:04:38,562 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:04:38,562 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:04:38,584 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:04:38,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:04:38,605 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:04:38,605 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:04:38,605 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:04:38,605 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:04:38,605 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:04:38,605 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:04:38,605 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:04:38,605 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:04:38,611 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-02-19 19:04:38,638 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 19:04:38,646 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:38,646 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 19:04:38,646 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-02-19 19:04:38,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:38,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37206818] [2021-02-19 19:04:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:38,828 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 19:04:38,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37206818] [2021-02-19 19:04:38,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:04:38,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 19:04:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562802617] [2021-02-19 19:04:38,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:04:38,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:04:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:04:38,842 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:38,886 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-02-19 19:04:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:04:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 19:04:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:38,895 INFO L225 Difference]: With dead ends: 217 [2021-02-19 19:04:38,895 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 19:04:38,896 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:04:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 19:04:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-02-19 19:04:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-02-19 19:04:38,933 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-02-19 19:04:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:38,933 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-02-19 19:04:38,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-02-19 19:04:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 19:04:38,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:38,935 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 19:04:38,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:04:38,935 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-02-19 19:04:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309268172] [2021-02-19 19:04:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:38,967 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 19:04:38,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309268172] [2021-02-19 19:04:38,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:04:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:04:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668802340] [2021-02-19 19:04:38,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:04:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:04:38,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:04:38,969 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:39,012 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-02-19 19:04:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:04:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 19:04:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:39,016 INFO L225 Difference]: With dead ends: 158 [2021-02-19 19:04:39,016 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 19:04:39,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:04:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 19:04:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-02-19 19:04:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-02-19 19:04:39,027 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-02-19 19:04:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:39,027 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-02-19 19:04:39,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-02-19 19:04:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 19:04:39,028 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:39,028 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 19:04:39,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:04:39,028 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-02-19 19:04:39,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:39,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026603862] [2021-02-19 19:04:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:39,066 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 19:04:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026603862] [2021-02-19 19:04:39,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:04:39,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:04:39,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302395823] [2021-02-19 19:04:39,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:04:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:04:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:04:39,068 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:39,118 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-02-19 19:04:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:04:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 19:04:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:39,121 INFO L225 Difference]: With dead ends: 183 [2021-02-19 19:04:39,121 INFO L226 Difference]: Without dead ends: 183 [2021-02-19 19:04:39,121 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 19:04:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-02-19 19:04:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-02-19 19:04:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-02-19 19:04:39,134 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-02-19 19:04:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:39,134 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-02-19 19:04:39,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-02-19 19:04:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:04:39,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:39,135 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, 1, 1] [2021-02-19 19:04:39,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:04:39,136 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-02-19 19:04:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:39,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141278692] [2021-02-19 19:04:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141278692] [2021-02-19 19:04:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947782311] [2021-02-19 19:04:39,460 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 19:04:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:04:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:39,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-02-19 19:04:39,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:39,857 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 16 treesize of output 10 [2021-02-19 19:04:39,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:39,861 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 16 treesize of output 10 [2021-02-19 19:04:39,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:39,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:39,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:04:39,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-02-19 19:04:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:39,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:39,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:04:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966436805] [2021-02-19 19:04:39,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:39,934 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:40,154 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-02-19 19:04:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:04:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:04:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:40,158 INFO L225 Difference]: With dead ends: 330 [2021-02-19 19:04:40,158 INFO L226 Difference]: Without dead ends: 315 [2021-02-19 19:04:40,158 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:04:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-02-19 19:04:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-02-19 19:04:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-02-19 19:04:40,193 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-02-19 19:04:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:40,193 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-02-19 19:04:40,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-02-19 19:04:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:04:40,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:40,194 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, 1, 1] [2021-02-19 19:04:40,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-02-19 19:04:40,408 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-02-19 19:04:40,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:40,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492330124] [2021-02-19 19:04:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:40,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492330124] [2021-02-19 19:04:40,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431186440] [2021-02-19 19:04:40,631 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 19:04:40,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:04:40,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:40,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:04:40,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-02-19 19:04:40,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:40,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:04:40,844 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-02-19 19:04:40,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:40,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:40,854 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-02-19 19:04:40,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:40,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:40,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:04:40,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:40,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:40,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:04:40,921 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-02-19 19:04:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:41,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:41,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-02-19 19:04:41,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344815587] [2021-02-19 19:04:41,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:04:41,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:04:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:04:41,026 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:41,511 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-02-19 19:04:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:04:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:04:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:41,513 INFO L225 Difference]: With dead ends: 374 [2021-02-19 19:04:41,514 INFO L226 Difference]: Without dead ends: 359 [2021-02-19 19:04:41,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:04:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-02-19 19:04:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-02-19 19:04:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-02-19 19:04:41,520 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-02-19 19:04:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:41,520 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-02-19 19:04:41,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-02-19 19:04:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:04:41,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:41,522 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, 1, 1] [2021-02-19 19:04:41,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:04:41,738 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:41,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-02-19 19:04:41,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:41,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224458569] [2021-02-19 19:04:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224458569] [2021-02-19 19:04:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534285589] [2021-02-19 19:04:41,906 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 19:04:41,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:04:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 19:04:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:42,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:42,079 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 16 treesize of output 10 [2021-02-19 19:04:42,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:42,108 INFO L628 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2021-02-19 19:04:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:04:42,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-02-19 19:04:42,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:42,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:42,122 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 19:04:42,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:21 [2021-02-19 19:04:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:42,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:42,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:04:42,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730525447] [2021-02-19 19:04:42,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:04:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:04:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:04:42,161 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:42,334 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-02-19 19:04:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:04:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:04:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:42,335 INFO L225 Difference]: With dead ends: 296 [2021-02-19 19:04:42,335 INFO L226 Difference]: Without dead ends: 281 [2021-02-19 19:04:42,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:04:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-02-19 19:04:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-02-19 19:04:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-02-19 19:04:42,341 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-02-19 19:04:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:42,341 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-02-19 19:04:42,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-02-19 19:04:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 19:04:42,342 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:42,342 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, 1, 1] [2021-02-19 19:04:42,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:42,559 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-02-19 19:04:42,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:42,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294817437] [2021-02-19 19:04:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294817437] [2021-02-19 19:04:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387958405] [2021-02-19 19:04:42,729 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 19:04:42,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:04:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:04:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:42,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:42,913 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-02-19 19:04:42,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:42,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:04:42,924 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-02-19 19:04:42,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:42,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:42,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:42,992 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:04:42,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:43,001 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:04:43,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-02-19 19:04:43,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:04:43,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:04:43,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:04:43,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:122 [2021-02-19 19:04:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:43,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:43,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:04:43,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235653905] [2021-02-19 19:04:43,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:43,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:43,202 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:43,496 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-02-19 19:04:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:04:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 19:04:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:43,499 INFO L225 Difference]: With dead ends: 425 [2021-02-19 19:04:43,499 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 19:04:43,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:04:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 19:04:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-02-19 19:04:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-02-19 19:04:43,504 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-02-19 19:04:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:43,506 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-02-19 19:04:43,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-02-19 19:04:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:43,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:43,506 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:43,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:43,723 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-02-19 19:04:43,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:43,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954771135] [2021-02-19 19:04:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:43,768 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 19:04:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954771135] [2021-02-19 19:04:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422512176] [2021-02-19 19:04:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:43,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:04:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:43,873 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 19:04:43,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:43,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:04:43,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577494610] [2021-02-19 19:04:43,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:04:43,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:04:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:04:43,874 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:44,176 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-02-19 19:04:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:04:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:44,179 INFO L225 Difference]: With dead ends: 619 [2021-02-19 19:04:44,179 INFO L226 Difference]: Without dead ends: 619 [2021-02-19 19:04:44,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:04:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-19 19:04:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-02-19 19:04:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-02-19 19:04:44,186 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-02-19 19:04:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:44,186 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-02-19 19:04:44,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-02-19 19:04:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:44,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:44,187 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:44,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 19:04:44,403 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-02-19 19:04:44,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:44,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879277511] [2021-02-19 19:04:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:44,457 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 19:04:44,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879277511] [2021-02-19 19:04:44,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704629081] [2021-02-19 19:04:44,458 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 19:04:44,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:04:44,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:44,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:44,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:44,558 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 19:04:44,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:44,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203787501] [2021-02-19 19:04:44,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:44,559 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:45,181 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-02-19 19:04:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:04:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:45,185 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 19:04:45,185 INFO L226 Difference]: Without dead ends: 1078 [2021-02-19 19:04:45,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:04:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-02-19 19:04:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-02-19 19:04:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-02-19 19:04:45,195 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-02-19 19:04:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:45,196 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-02-19 19:04:45,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-02-19 19:04:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:45,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:45,197 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:45,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:45,406 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-02-19 19:04:45,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:45,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097468675] [2021-02-19 19:04:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:45,446 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 19:04:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097468675] [2021-02-19 19:04:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875487788] [2021-02-19 19:04:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:45,587 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 19:04:45,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:45,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288359709] [2021-02-19 19:04:45,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:45,589 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:46,126 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-02-19 19:04:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:04:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:46,129 INFO L225 Difference]: With dead ends: 951 [2021-02-19 19:04:46,129 INFO L226 Difference]: Without dead ends: 951 [2021-02-19 19:04:46,130 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:04:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-02-19 19:04:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-02-19 19:04:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-02-19 19:04:46,138 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-02-19 19:04:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:46,138 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-02-19 19:04:46,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-02-19 19:04:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:46,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:46,139 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, 1, 1, 1, 1] [2021-02-19 19:04:46,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:46,354 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-02-19 19:04:46,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:46,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556670331] [2021-02-19 19:04:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:46,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556670331] [2021-02-19 19:04:46,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86842933] [2021-02-19 19:04:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:04:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:46,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:46,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:04:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350153920] [2021-02-19 19:04:46,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:04:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:04:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:04:46,458 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:46,554 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-02-19 19:04:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:04:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:46,556 INFO L225 Difference]: With dead ends: 669 [2021-02-19 19:04:46,556 INFO L226 Difference]: Without dead ends: 663 [2021-02-19 19:04:46,557 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-02-19 19:04:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-02-19 19:04:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-02-19 19:04:46,564 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-02-19 19:04:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:46,565 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-02-19 19:04:46,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-02-19 19:04:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:46,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:46,566 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:46,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 19:04:46,780 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-02-19 19:04:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:46,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981219004] [2021-02-19 19:04:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981219004] [2021-02-19 19:04:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514925160] [2021-02-19 19:04:46,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:46,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:46,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:04:46,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566665592] [2021-02-19 19:04:46,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:46,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:46,928 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:47,088 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-02-19 19:04:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:04:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:47,090 INFO L225 Difference]: With dead ends: 710 [2021-02-19 19:04:47,091 INFO L226 Difference]: Without dead ends: 672 [2021-02-19 19:04:47,091 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:04:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-02-19 19:04:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-02-19 19:04:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-02-19 19:04:47,100 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-02-19 19:04:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:47,100 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-02-19 19:04:47,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-02-19 19:04:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:47,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:47,101 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, 1, 1, 1, 1] [2021-02-19 19:04:47,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 19:04:47,315 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-02-19 19:04:47,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:47,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553192729] [2021-02-19 19:04:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:47,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553192729] [2021-02-19 19:04:47,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911136256] [2021-02-19 19:04:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:47,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:04:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:47,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:47,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:04:47,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160682140] [2021-02-19 19:04:47,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:04:47,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:04:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:04:47,396 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:47,480 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-02-19 19:04:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:04:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:47,483 INFO L225 Difference]: With dead ends: 830 [2021-02-19 19:04:47,484 INFO L226 Difference]: Without dead ends: 830 [2021-02-19 19:04:47,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-02-19 19:04:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-02-19 19:04:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-02-19 19:04:47,494 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-02-19 19:04:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:47,494 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-02-19 19:04:47,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-02-19 19:04:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:47,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:47,495 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:47,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 19:04:47,711 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-02-19 19:04:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:47,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681751576] [2021-02-19 19:04:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:47,755 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 19:04:47,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681751576] [2021-02-19 19:04:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587045242] [2021-02-19 19:04:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:47,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:04:47,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:47,846 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 19:04:47,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:04:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776043896] [2021-02-19 19:04:47,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:04:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:04:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:04:47,848 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:48,099 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-02-19 19:04:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:04:48,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:48,103 INFO L225 Difference]: With dead ends: 1196 [2021-02-19 19:04:48,103 INFO L226 Difference]: Without dead ends: 1196 [2021-02-19 19:04:48,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:04:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-02-19 19:04:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-02-19 19:04:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-02-19 19:04:48,116 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-02-19 19:04:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-02-19 19:04:48,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-02-19 19:04:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:48,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:48,117 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:48,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-02-19 19:04:48,332 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-02-19 19:04:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:48,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447767522] [2021-02-19 19:04:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:48,370 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 19:04:48,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447767522] [2021-02-19 19:04:48,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732248855] [2021-02-19 19:04:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:48,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:04:48,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:48,453 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 19:04:48,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:48,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:04:48,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336504860] [2021-02-19 19:04:48,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:04:48,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:04:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:04:48,455 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:48,801 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-02-19 19:04:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:04:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:48,806 INFO L225 Difference]: With dead ends: 1492 [2021-02-19 19:04:48,806 INFO L226 Difference]: Without dead ends: 1492 [2021-02-19 19:04:48,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:04:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-02-19 19:04:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-02-19 19:04:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-02-19 19:04:48,820 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-02-19 19:04:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:48,820 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-02-19 19:04:48,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-02-19 19:04:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:48,821 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:48,821 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:49,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:49,036 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-02-19 19:04:49,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:49,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451587960] [2021-02-19 19:04:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:49,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451587960] [2021-02-19 19:04:49,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170767801] [2021-02-19 19:04:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:49,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:49,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:49,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:49,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:04:49,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952231710] [2021-02-19 19:04:49,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:49,158 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:49,397 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-02-19 19:04:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:04:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:49,401 INFO L225 Difference]: With dead ends: 1258 [2021-02-19 19:04:49,401 INFO L226 Difference]: Without dead ends: 1248 [2021-02-19 19:04:49,401 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:04:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-02-19 19:04:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-02-19 19:04:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-02-19 19:04:49,418 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-02-19 19:04:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-02-19 19:04:49,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-02-19 19:04:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:49,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:49,421 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:49,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 19:04:49,634 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-02-19 19:04:49,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:49,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639251876] [2021-02-19 19:04:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639251876] [2021-02-19 19:04:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402643781] [2021-02-19 19:04:49,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:49,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:04:49,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:49,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:49,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:04:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225532885] [2021-02-19 19:04:49,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:49,761 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:50,011 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-02-19 19:04:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:04:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:50,015 INFO L225 Difference]: With dead ends: 1329 [2021-02-19 19:04:50,015 INFO L226 Difference]: Without dead ends: 1329 [2021-02-19 19:04:50,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:04:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-02-19 19:04:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-02-19 19:04:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-02-19 19:04:50,029 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-02-19 19:04:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:50,029 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-02-19 19:04:50,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-02-19 19:04:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:50,031 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:50,031 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:50,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:50,245 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:50,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-02-19 19:04:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:50,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240370146] [2021-02-19 19:04:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:50,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240370146] [2021-02-19 19:04:50,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394430400] [2021-02-19 19:04:50,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:50,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:50,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:04:50,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075160725] [2021-02-19 19:04:50,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:04:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:04:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:04:50,354 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:50,654 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-02-19 19:04:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:04:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:50,659 INFO L225 Difference]: With dead ends: 1548 [2021-02-19 19:04:50,660 INFO L226 Difference]: Without dead ends: 1544 [2021-02-19 19:04:50,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:04:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-02-19 19:04:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-02-19 19:04:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-02-19 19:04:50,675 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-02-19 19:04:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:50,675 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-02-19 19:04:50,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-02-19 19:04:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:50,676 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:50,676 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:50,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 19:04:50,885 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-02-19 19:04:50,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:50,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154491485] [2021-02-19 19:04:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:50,916 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 19:04:50,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154491485] [2021-02-19 19:04:50,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569315174] [2021-02-19 19:04:50,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:04:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:51,030 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 19:04:51,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:51,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621481345] [2021-02-19 19:04:51,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:51,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:51,032 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:51,736 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-02-19 19:04:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:04:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:51,747 INFO L225 Difference]: With dead ends: 2734 [2021-02-19 19:04:51,747 INFO L226 Difference]: Without dead ends: 2734 [2021-02-19 19:04:51,747 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:04:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-02-19 19:04:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-02-19 19:04:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-02-19 19:04:51,773 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-02-19 19:04:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:51,773 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-02-19 19:04:51,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-02-19 19:04:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:51,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:51,774 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:51,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:51,989 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-02-19 19:04:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:51,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57479736] [2021-02-19 19:04:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:52,021 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 19:04:52,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57479736] [2021-02-19 19:04:52,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452834265] [2021-02-19 19:04:52,021 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 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 19:04:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:04:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:52,110 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 19:04:52,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:52,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:52,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260882504] [2021-02-19 19:04:52,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:52,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:52,111 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:52,730 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-02-19 19:04:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:04:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:52,743 INFO L225 Difference]: With dead ends: 2693 [2021-02-19 19:04:52,743 INFO L226 Difference]: Without dead ends: 2693 [2021-02-19 19:04:52,744 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:04:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-02-19 19:04:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-02-19 19:04:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-02-19 19:04:52,778 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-02-19 19:04:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:52,778 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-02-19 19:04:52,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-02-19 19:04:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:52,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:52,780 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:52,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 19:04:52,997 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-02-19 19:04:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:52,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097026666] [2021-02-19 19:04:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:53,028 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 19:04:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097026666] [2021-02-19 19:04:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442210543] [2021-02-19 19:04:53,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:53,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:04:53,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:53,111 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 19:04:53,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:53,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:04:53,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117146531] [2021-02-19 19:04:53,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:04:53,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:04:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:04:53,112 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:53,649 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-02-19 19:04:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:04:53,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:53,654 INFO L225 Difference]: With dead ends: 2677 [2021-02-19 19:04:53,654 INFO L226 Difference]: Without dead ends: 2677 [2021-02-19 19:04:53,655 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:04:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-02-19 19:04:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-02-19 19:04:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-02-19 19:04:53,678 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-02-19 19:04:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:53,679 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-02-19 19:04:53,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-02-19 19:04:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:53,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:53,680 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:53,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 19:04:53,895 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-02-19 19:04:53,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961835471] [2021-02-19 19:04:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:53,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961835471] [2021-02-19 19:04:53,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174310581] [2021-02-19 19:04:53,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:53,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:04:53,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:54,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:54,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:04:54,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937768840] [2021-02-19 19:04:54,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:04:54,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:04:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:04:54,011 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:54,565 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-02-19 19:04:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:04:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:54,570 INFO L225 Difference]: With dead ends: 2474 [2021-02-19 19:04:54,570 INFO L226 Difference]: Without dead ends: 2470 [2021-02-19 19:04:54,570 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:04:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-02-19 19:04:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-02-19 19:04:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-02-19 19:04:54,591 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-02-19 19:04:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:54,591 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-02-19 19:04:54,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-02-19 19:04:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:54,593 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:54,593 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:54,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 19:04:54,808 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-02-19 19:04:54,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:54,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122381714] [2021-02-19 19:04:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:54,837 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 19:04:54,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122381714] [2021-02-19 19:04:54,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511275149] [2021-02-19 19:04:54,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:54,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:04:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:54,934 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 19:04:54,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:54,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:54,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934964521] [2021-02-19 19:04:54,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:54,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:54,935 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:55,497 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-02-19 19:04:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:04:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:55,502 INFO L225 Difference]: With dead ends: 2514 [2021-02-19 19:04:55,502 INFO L226 Difference]: Without dead ends: 2514 [2021-02-19 19:04:55,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:04:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-02-19 19:04:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-02-19 19:04:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-02-19 19:04:55,523 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-02-19 19:04:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:55,524 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-02-19 19:04:55,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-02-19 19:04:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:55,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:55,525 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:55,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:04:55,740 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-02-19 19:04:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:55,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130014437] [2021-02-19 19:04:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:55,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130014437] [2021-02-19 19:04:55,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178668971] [2021-02-19 19:04:55,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:55,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:55,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753242810] [2021-02-19 19:04:55,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:55,859 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:56,384 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-02-19 19:04:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:04:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:56,388 INFO L225 Difference]: With dead ends: 2332 [2021-02-19 19:04:56,388 INFO L226 Difference]: Without dead ends: 2328 [2021-02-19 19:04:56,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:04:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-02-19 19:04:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-02-19 19:04:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-02-19 19:04:56,407 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-02-19 19:04:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:56,407 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-02-19 19:04:56,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-02-19 19:04:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:56,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:56,409 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, 1, 1, 1, 1] [2021-02-19 19:04:56,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:56,622 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-02-19 19:04:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:56,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205581233] [2021-02-19 19:04:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205581233] [2021-02-19 19:04:56,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827214383] [2021-02-19 19:04:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:56,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:04:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:04:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:04:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110691058] [2021-02-19 19:04:56,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:04:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:04:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:04:56,710 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:56,775 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-02-19 19:04:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:04:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:56,777 INFO L225 Difference]: With dead ends: 929 [2021-02-19 19:04:56,777 INFO L226 Difference]: Without dead ends: 929 [2021-02-19 19:04:56,777 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:04:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-02-19 19:04:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-02-19 19:04:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-02-19 19:04:56,787 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-02-19 19:04:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:56,787 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-02-19 19:04:56,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-02-19 19:04:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:56,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:56,789 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:57,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:57,002 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-02-19 19:04:57,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:57,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211658116] [2021-02-19 19:04:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:57,031 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 19:04:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211658116] [2021-02-19 19:04:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854231343] [2021-02-19 19:04:57,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:57,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:04:57,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:57,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:57,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:57,094 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 19:04:57,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:57,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:04:57,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47870338] [2021-02-19 19:04:57,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:04:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:04:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:04:57,096 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:57,344 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-02-19 19:04:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:04:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:57,347 INFO L225 Difference]: With dead ends: 1555 [2021-02-19 19:04:57,347 INFO L226 Difference]: Without dead ends: 1555 [2021-02-19 19:04:57,347 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:04:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-02-19 19:04:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-02-19 19:04:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-02-19 19:04:57,360 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-02-19 19:04:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:57,360 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-02-19 19:04:57,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-02-19 19:04:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:57,361 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:57,361 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:57,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:57,576 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-02-19 19:04:57,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:57,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157268430] [2021-02-19 19:04:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:57,614 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 19:04:57,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157268430] [2021-02-19 19:04:57,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968339968] [2021-02-19 19:04:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:57,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:04:57,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:57,685 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 19:04:57,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:57,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:04:57,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419317144] [2021-02-19 19:04:57,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:04:57,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:04:57,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:04:57,686 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:57,897 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-02-19 19:04:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:04:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:57,900 INFO L225 Difference]: With dead ends: 1605 [2021-02-19 19:04:57,900 INFO L226 Difference]: Without dead ends: 1605 [2021-02-19 19:04:57,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:04:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-02-19 19:04:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-02-19 19:04:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-02-19 19:04:57,914 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-02-19 19:04:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:57,914 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-02-19 19:04:57,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-02-19 19:04:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:57,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:57,916 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:58,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:58,134 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-02-19 19:04:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482554297] [2021-02-19 19:04:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482554297] [2021-02-19 19:04:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50123123] [2021-02-19 19:04:58,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:58,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:04:58,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:04:58,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:58,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:04:58,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691895589] [2021-02-19 19:04:58,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:04:58,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:58,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:04:58,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:04:58,221 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:58,384 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-02-19 19:04:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:04:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:58,387 INFO L225 Difference]: With dead ends: 1524 [2021-02-19 19:04:58,387 INFO L226 Difference]: Without dead ends: 1520 [2021-02-19 19:04:58,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:04:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-02-19 19:04:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-02-19 19:04:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-02-19 19:04:58,405 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-02-19 19:04:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:58,405 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-02-19 19:04:58,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-02-19 19:04:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:58,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:58,406 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:58,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 19:04:58,618 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-02-19 19:04:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:58,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533871673] [2021-02-19 19:04:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:58,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533871673] [2021-02-19 19:04:58,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194124309] [2021-02-19 19:04:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:04:58,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:04:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:58,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:04:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:04:58,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:58,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:04:58,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259441316] [2021-02-19 19:04:58,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:04:58,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:04:58,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:04:58,716 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:58,914 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-02-19 19:04:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:04:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:58,916 INFO L225 Difference]: With dead ends: 1508 [2021-02-19 19:04:58,916 INFO L226 Difference]: Without dead ends: 1496 [2021-02-19 19:04:58,917 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:04:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-02-19 19:04:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-02-19 19:04:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-02-19 19:04:58,929 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-02-19 19:04:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:58,929 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-02-19 19:04:58,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-02-19 19:04:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:58,931 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:58,931 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:59,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:59,131 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-02-19 19:04:59,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:59,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220262940] [2021-02-19 19:04:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:59,161 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 19:04:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220262940] [2021-02-19 19:04:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607475939] [2021-02-19 19:04:59,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:04:59,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:04:59,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:04:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:04:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:04:59,264 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 19:04:59,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:04:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:04:59,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271333799] [2021-02-19 19:04:59,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:04:59,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:04:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:04:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:04:59,265 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:04:59,727 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-02-19 19:04:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:04:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:04:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:04:59,730 INFO L225 Difference]: With dead ends: 2412 [2021-02-19 19:04:59,730 INFO L226 Difference]: Without dead ends: 2412 [2021-02-19 19:04:59,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:04:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-02-19 19:04:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-02-19 19:04:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-02-19 19:04:59,747 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-02-19 19:04:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:04:59,747 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-02-19 19:04:59,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:04:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-02-19 19:04:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:04:59,749 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:04:59,749 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:04:59,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 19:04:59,956 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:04:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:04:59,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-02-19 19:04:59,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:04:59,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047772693] [2021-02-19 19:04:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:04:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:04:59,993 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 19:04:59,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047772693] [2021-02-19 19:04:59,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886780719] [2021-02-19 19:04:59,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:00,084 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 19:05:00,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:00,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:05:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941031749] [2021-02-19 19:05:00,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:05:00,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:05:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:05:00,085 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:00,512 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-02-19 19:05:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:05:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:00,515 INFO L225 Difference]: With dead ends: 2335 [2021-02-19 19:05:00,515 INFO L226 Difference]: Without dead ends: 2335 [2021-02-19 19:05:00,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:05:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-02-19 19:05:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-02-19 19:05:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:05:00,533 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:05:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:00,533 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:05:00,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:05:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:00,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:00,534 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:00,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:00,742 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:00,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-02-19 19:05:00,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:00,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502463199] [2021-02-19 19:05:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:00,782 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 19:05:00,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502463199] [2021-02-19 19:05:00,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149536457] [2021-02-19 19:05:00,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:00,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:05:00,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:00,875 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 19:05:00,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:00,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:05:00,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024413645] [2021-02-19 19:05:00,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:05:00,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:00,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:05:00,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:05:00,876 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:01,277 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-02-19 19:05:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:05:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:01,282 INFO L225 Difference]: With dead ends: 2285 [2021-02-19 19:05:01,282 INFO L226 Difference]: Without dead ends: 2285 [2021-02-19 19:05:01,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:05:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-02-19 19:05:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-02-19 19:05:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:05:01,301 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:05:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:01,301 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:05:01,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:05:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:01,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:01,302 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:01,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 19:05:01,503 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-02-19 19:05:01,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:01,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489370654] [2021-02-19 19:05:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489370654] [2021-02-19 19:05:01,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677363376] [2021-02-19 19:05:01,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:01,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:05:01,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:01,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:01,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:05:01,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774964348] [2021-02-19 19:05:01,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:05:01,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:05:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:05:01,607 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:01,937 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-02-19 19:05:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:05:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:01,941 INFO L225 Difference]: With dead ends: 2176 [2021-02-19 19:05:01,941 INFO L226 Difference]: Without dead ends: 2172 [2021-02-19 19:05:01,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:05:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-02-19 19:05:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-02-19 19:05:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:05:01,959 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:05:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:01,959 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:05:01,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:05:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:01,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:01,960 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:02,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:02,161 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-02-19 19:05:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608442416] [2021-02-19 19:05:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:02,193 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 19:05:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608442416] [2021-02-19 19:05:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935176553] [2021-02-19 19:05:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:02,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:05:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:02,306 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 19:05:02,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:02,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:05:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583884809] [2021-02-19 19:05:02,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:05:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:05:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:05:02,307 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:02,665 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-02-19 19:05:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:05:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:02,668 INFO L225 Difference]: With dead ends: 2199 [2021-02-19 19:05:02,668 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 19:05:02,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:05:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 19:05:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-02-19 19:05:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-02-19 19:05:02,685 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-02-19 19:05:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:02,685 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-02-19 19:05:02,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-02-19 19:05:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:02,687 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:02,687 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:02,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:02,887 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-02-19 19:05:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:02,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661278178] [2021-02-19 19:05:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661278178] [2021-02-19 19:05:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076522609] [2021-02-19 19:05:02,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:02,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:05:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:03,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:03,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:05:03,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710481689] [2021-02-19 19:05:03,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:05:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:05:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:05:03,015 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:03,354 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-02-19 19:05:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:05:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:03,357 INFO L225 Difference]: With dead ends: 2156 [2021-02-19 19:05:03,357 INFO L226 Difference]: Without dead ends: 2152 [2021-02-19 19:05:03,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:05:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-02-19 19:05:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-02-19 19:05:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-02-19 19:05:03,375 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-02-19 19:05:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:03,375 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-02-19 19:05:03,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-02-19 19:05:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:03,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:03,377 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:03,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-02-19 19:05:03,590 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-02-19 19:05:03,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:03,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395397930] [2021-02-19 19:05:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395397930] [2021-02-19 19:05:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807983611] [2021-02-19 19:05:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:03,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:05:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:03,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:03,689 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 19:05:03,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:03,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:05:03,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188948107] [2021-02-19 19:05:03,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:05:03,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:05:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:05:03,690 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:04,006 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-02-19 19:05:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:05:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:04,009 INFO L225 Difference]: With dead ends: 2097 [2021-02-19 19:05:04,009 INFO L226 Difference]: Without dead ends: 2097 [2021-02-19 19:05:04,009 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:05:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-02-19 19:05:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-02-19 19:05:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-02-19 19:05:04,028 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-02-19 19:05:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:04,028 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-02-19 19:05:04,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-02-19 19:05:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:04,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:04,029 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:04,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:04,230 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:04,230 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-02-19 19:05:04,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:04,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840226584] [2021-02-19 19:05:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:04,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840226584] [2021-02-19 19:05:04,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427764612] [2021-02-19 19:05:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:04,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:04,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:05:04,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665644504] [2021-02-19 19:05:04,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:05:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:05:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:05:04,323 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:04,565 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-02-19 19:05:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:05:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:04,568 INFO L225 Difference]: With dead ends: 1963 [2021-02-19 19:05:04,568 INFO L226 Difference]: Without dead ends: 1959 [2021-02-19 19:05:04,568 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:05:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-02-19 19:05:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-02-19 19:05:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-02-19 19:05:04,585 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-02-19 19:05:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:04,585 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-02-19 19:05:04,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-02-19 19:05:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:04,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:04,586 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:04,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-02-19 19:05:04,801 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-02-19 19:05:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:04,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851070221] [2021-02-19 19:05:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851070221] [2021-02-19 19:05:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595686655] [2021-02-19 19:05:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:04,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:05:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:04,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:04,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:05:04,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209624988] [2021-02-19 19:05:04,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:05:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:05:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:05:04,894 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:05,096 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-02-19 19:05:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:05:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:05,099 INFO L225 Difference]: With dead ends: 1728 [2021-02-19 19:05:05,099 INFO L226 Difference]: Without dead ends: 1716 [2021-02-19 19:05:05,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:05:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-02-19 19:05:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-02-19 19:05:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-02-19 19:05:05,114 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-02-19 19:05:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:05,114 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-02-19 19:05:05,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-02-19 19:05:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:05,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:05,115 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:05,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:05,330 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:05,330 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-02-19 19:05:05,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:05,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31745286] [2021-02-19 19:05:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:05,358 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 19:05:05,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31745286] [2021-02-19 19:05:05,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656748133] [2021-02-19 19:05:05,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:05,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:05:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:05,450 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 19:05:05,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:05,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:05:05,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775327652] [2021-02-19 19:05:05,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:05:05,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:05:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:05:05,451 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:05,737 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-02-19 19:05:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:05:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:05,739 INFO L225 Difference]: With dead ends: 1821 [2021-02-19 19:05:05,739 INFO L226 Difference]: Without dead ends: 1821 [2021-02-19 19:05:05,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:05:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-02-19 19:05:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-02-19 19:05:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-02-19 19:05:05,755 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-02-19 19:05:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:05,755 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-02-19 19:05:05,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-02-19 19:05:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:05,756 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:05,756 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:05,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 19:05:05,962 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-02-19 19:05:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:05,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87056720] [2021-02-19 19:05:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:05,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87056720] [2021-02-19 19:05:05,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235801432] [2021-02-19 19:05:05,993 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 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 19:05:06,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:05:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:06,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:06,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:05:06,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751361392] [2021-02-19 19:05:06,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:05:06,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:05:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:05:06,072 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:06,320 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-02-19 19:05:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:05:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:06,323 INFO L225 Difference]: With dead ends: 1790 [2021-02-19 19:05:06,323 INFO L226 Difference]: Without dead ends: 1786 [2021-02-19 19:05:06,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:05:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-02-19 19:05:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-02-19 19:05:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-02-19 19:05:06,339 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-02-19 19:05:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:06,339 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-02-19 19:05:06,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-02-19 19:05:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 19:05:06,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:06,341 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:06,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-02-19 19:05:06,554 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-02-19 19:05:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:06,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76720572] [2021-02-19 19:05:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76720572] [2021-02-19 19:05:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851341605] [2021-02-19 19:05:06,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:06,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:05:06,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:05:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:06,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:06,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:05:06,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233046697] [2021-02-19 19:05:06,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:05:06,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:05:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:05:06,654 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:06,802 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-02-19 19:05:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:05:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 19:05:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:06,805 INFO L225 Difference]: With dead ends: 1649 [2021-02-19 19:05:06,805 INFO L226 Difference]: Without dead ends: 1637 [2021-02-19 19:05:06,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:05:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-02-19 19:05:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-02-19 19:05:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-02-19 19:05:06,826 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-02-19 19:05:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:06,826 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-02-19 19:05:06,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-02-19 19:05:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:06,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:06,827 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:07,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:07,028 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-02-19 19:05:07,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:07,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824432757] [2021-02-19 19:05:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:07,395 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-02-19 19:05:07,548 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-02-19 19:05:07,680 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 19:05:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:07,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824432757] [2021-02-19 19:05:07,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639375988] [2021-02-19 19:05:07,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:07,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:05:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:08,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:08,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:08,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-02-19 19:05:08,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:08,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:08,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:08,245 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:08,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:08,257 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:08,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:08,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:08,274 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:08,280 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:08,286 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:08,291 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:08,370 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-02-19 19:05:08,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:08,372 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-02-19 19:05:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:08,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:08,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:05:08,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77893916] [2021-02-19 19:05:08,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:05:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:05:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:05:08,428 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:08,977 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-02-19 19:05:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:09,218 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-02-19 19:05:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:05:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:09,220 INFO L225 Difference]: With dead ends: 1517 [2021-02-19 19:05:09,221 INFO L226 Difference]: Without dead ends: 1502 [2021-02-19 19:05:09,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:05:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-02-19 19:05:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-02-19 19:05:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-02-19 19:05:09,234 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-02-19 19:05:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:09,234 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-02-19 19:05:09,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-02-19 19:05:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:09,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:09,236 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:09,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 19:05:09,437 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-02-19 19:05:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:09,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287152629] [2021-02-19 19:05:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:09,817 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-02-19 19:05:09,972 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-02-19 19:05:10,104 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 19:05:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287152629] [2021-02-19 19:05:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443359494] [2021-02-19 19:05:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:10,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:05:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:05:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:11,071 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-02-19 19:05:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:11,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:11,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:11,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:11,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:11,269 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 19:05:11,270 INFO L628 ElimStorePlain]: treesize reduction 46, result has 75.4 percent of original size [2021-02-19 19:05:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:11,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:11,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:11,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:11,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:11,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:11,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:11,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:11,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:11,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:11,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:11,382 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:225, output treesize:51 [2021-02-19 19:05:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:11,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:11,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:05:11,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328507293] [2021-02-19 19:05:11,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:05:11,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:11,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:05:11,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:05:11,463 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:12,106 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 19:05:12,456 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-02-19 19:05:12,674 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-19 19:05:13,197 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2021-02-19 19:05:13,641 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-02-19 19:05:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:13,949 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-02-19 19:05:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:05:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:13,952 INFO L225 Difference]: With dead ends: 1563 [2021-02-19 19:05:13,952 INFO L226 Difference]: Without dead ends: 1533 [2021-02-19 19:05:13,952 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:05:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-02-19 19:05:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-02-19 19:05:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-02-19 19:05:13,967 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-02-19 19:05:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:13,967 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-02-19 19:05:13,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-02-19 19:05:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:13,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:13,969 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:14,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:14,176 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-02-19 19:05:14,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:14,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165528743] [2021-02-19 19:05:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:14,648 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-02-19 19:05:14,773 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-02-19 19:05:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:14,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165528743] [2021-02-19 19:05:14,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134360869] [2021-02-19 19:05:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:14,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:05:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:05:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:15,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:15,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:15,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-02-19 19:05:15,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:05:15,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:05:15,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:05:15,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-02-19 19:05:15,594 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:05:15,604 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:15,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:05:15,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:15,632 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-02-19 19:05:15,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:15,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-02-19 19:05:15,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:15,671 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-02-19 19:05:15,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:05:15,686 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-02-19 19:05:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:15,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:15,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:05:15,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704916154] [2021-02-19 19:05:15,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:05:15,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:15,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:05:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:05:15,722 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:17,738 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-02-19 19:05:18,365 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-02-19 19:05:18,498 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 19:05:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:18,508 INFO L93 Difference]: Finished difference Result 1660 states and 5351 transitions. [2021-02-19 19:05:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:05:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:18,510 INFO L225 Difference]: With dead ends: 1660 [2021-02-19 19:05:18,511 INFO L226 Difference]: Without dead ends: 1645 [2021-02-19 19:05:18,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:05:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-02-19 19:05:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1180. [2021-02-19 19:05:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-02-19 19:05:18,525 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-02-19 19:05:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:18,526 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-02-19 19:05:18,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-02-19 19:05:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:18,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:18,527 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:18,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:18,728 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:18,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-02-19 19:05:18,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:18,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145487989] [2021-02-19 19:05:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:18,936 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-02-19 19:05:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145487989] [2021-02-19 19:05:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749009987] [2021-02-19 19:05:19,287 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 19:05:19,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:05:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:05:19,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 19:05:19,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-02-19 19:05:19,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 19:05:19,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,612 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:19,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 19:05:19,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,623 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-02-19 19:05:19,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-02-19 19:05:19,635 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-02-19 19:05:19,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-02-19 19:05:19,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-02-19 19:05:19,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-02-19 19:05:19,696 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-02-19 19:05:19,712 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-02-19 19:05:19,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-02-19 19:05:19,742 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-02-19 19:05:19,755 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:19,761 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:19,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-02-19 19:05:19,762 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:19,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:19,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:05:19,839 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-02-19 19:05:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:20,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:20,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:05:20,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044143816] [2021-02-19 19:05:20,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:05:20,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:05:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:05:20,057 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:20,999 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-02-19 19:05:21,496 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-02-19 19:05:21,737 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-02-19 19:05:21,889 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-02-19 19:05:22,067 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-02-19 19:05:22,212 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 19:05:22,785 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 19:05:23,048 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2021-02-19 19:05:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:23,161 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-02-19 19:05:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:05:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:23,163 INFO L225 Difference]: With dead ends: 1843 [2021-02-19 19:05:23,163 INFO L226 Difference]: Without dead ends: 1828 [2021-02-19 19:05:23,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:05:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-02-19 19:05:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-02-19 19:05:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-02-19 19:05:23,180 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-02-19 19:05:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-02-19 19:05:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-02-19 19:05:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:23,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:23,182 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:23,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-02-19 19:05:23,382 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-02-19 19:05:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:23,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925841033] [2021-02-19 19:05:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:23,828 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-02-19 19:05:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:24,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925841033] [2021-02-19 19:05:24,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726972860] [2021-02-19 19:05:24,041 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 19:05:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:24,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-02-19 19:05:24,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:24,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:05:24,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:24,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-02-19 19:05:24,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-02-19 19:05:24,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:05:24,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:24,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:05:24,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:05:24,675 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:24,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:24,692 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:05:24,700 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-02-19 19:05:24,708 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:24,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:24,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:24,713 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:24,737 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-02-19 19:05:24,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:05:24,738 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-02-19 19:05:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:24,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:24,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 19:05:24,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517793835] [2021-02-19 19:05:24,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:05:24,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:05:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:05:24,772 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:25,957 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-02-19 19:05:27,514 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-02-19 19:05:27,661 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 19:05:27,786 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-02-19 19:05:27,948 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 19:05:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:27,962 INFO L93 Difference]: Finished difference Result 1879 states and 5994 transitions. [2021-02-19 19:05:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:05:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:27,965 INFO L225 Difference]: With dead ends: 1879 [2021-02-19 19:05:27,965 INFO L226 Difference]: Without dead ends: 1864 [2021-02-19 19:05:27,966 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=468, Invalid=2082, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:05:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-02-19 19:05:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1206. [2021-02-19 19:05:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-02-19 19:05:27,980 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-02-19 19:05:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:27,980 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-02-19 19:05:27,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-02-19 19:05:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:27,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:27,982 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:28,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:28,182 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-02-19 19:05:28,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:28,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233017404] [2021-02-19 19:05:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233017404] [2021-02-19 19:05:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818982446] [2021-02-19 19:05:28,780 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 19:05:28,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:05:28,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,431 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-02-19 19:05:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 19:05:29,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,464 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-02-19 19:05:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-02-19 19:05:29,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,504 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-02-19 19:05:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-02-19 19:05:29,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,538 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-02-19 19:05:29,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:05:29,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,577 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-02-19 19:05:29,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-02-19 19:05:29,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,598 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-02-19 19:05:29,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,616 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:05:29,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,638 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-02-19 19:05:29,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-02-19 19:05:29,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,671 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:05:29,672 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,688 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:05:29,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,705 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-02-19 19:05:29,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,730 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-02-19 19:05:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-02-19 19:05:29,731 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:29,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-02-19 19:05:29,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,780 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:05:29,781 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,796 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:05:29,797 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:29,807 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:05:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:05:29,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:29,925 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 19:05:29,926 INFO L628 ElimStorePlain]: treesize reduction 91, result has 59.4 percent of original size [2021-02-19 19:05:29,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:29,928 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-02-19 19:05:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:30,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:30,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-02-19 19:05:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663047002] [2021-02-19 19:05:30,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:05:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:05:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:05:30,114 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:30,906 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-02-19 19:05:31,572 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-02-19 19:05:31,700 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-02-19 19:05:31,915 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-02-19 19:05:32,061 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-02-19 19:05:32,412 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-02-19 19:05:32,541 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 19:05:32,997 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-02-19 19:05:33,151 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-02-19 19:05:33,301 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 19:05:33,664 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-02-19 19:05:34,006 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-02-19 19:05:34,176 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-02-19 19:05:34,441 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 19:05:34,752 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 19:05:34,883 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-02-19 19:05:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:35,018 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-02-19 19:05:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:05:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:35,022 INFO L225 Difference]: With dead ends: 2051 [2021-02-19 19:05:35,022 INFO L226 Difference]: Without dead ends: 2006 [2021-02-19 19:05:35,022 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:05:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-02-19 19:05:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-02-19 19:05:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-02-19 19:05:35,039 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-02-19 19:05:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:35,039 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-02-19 19:05:35,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-02-19 19:05:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:35,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:35,041 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:35,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable340 [2021-02-19 19:05:35,242 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-02-19 19:05:35,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:35,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507766047] [2021-02-19 19:05:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:35,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507766047] [2021-02-19 19:05:35,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556166938] [2021-02-19 19:05:35,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:36,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:36,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:36,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:36,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:36,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:36,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:36,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:36,215 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:36,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:36,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:36,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:36,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-02-19 19:05:36,246 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:36,255 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:36,260 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:36,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:36,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:36,264 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:36,345 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-02-19 19:05:36,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:36,346 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-02-19 19:05:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:36,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:36,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:05:36,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690513154] [2021-02-19 19:05:36,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:05:36,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:05:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:05:36,402 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:37,047 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-02-19 19:05:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:37,539 INFO L93 Difference]: Finished difference Result 1786 states and 5800 transitions. [2021-02-19 19:05:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:05:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:37,542 INFO L225 Difference]: With dead ends: 1786 [2021-02-19 19:05:37,542 INFO L226 Difference]: Without dead ends: 1771 [2021-02-19 19:05:37,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:05:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-02-19 19:05:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1392. [2021-02-19 19:05:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3163191948238677) internal successors, (4613), 1391 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4613 transitions. [2021-02-19 19:05:37,559 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4613 transitions. Word has length 26 [2021-02-19 19:05:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:37,559 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4613 transitions. [2021-02-19 19:05:37,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4613 transitions. [2021-02-19 19:05:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:37,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:37,561 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:37,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-02-19 19:05:37,774 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-02-19 19:05:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:37,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361144782] [2021-02-19 19:05:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:38,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361144782] [2021-02-19 19:05:38,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313683881] [2021-02-19 19:05:38,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:38,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:05:38,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:05:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:38,694 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 19:05:38,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:38,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:05:38,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:38,898 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-02-19 19:05:38,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:38,921 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:05:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:05:38,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,048 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 19:05:39,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,071 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:05:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:05:39,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,200 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 19:05:39,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:05:39,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,344 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-19 19:05:39,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,363 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:05:39,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:05:39,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,487 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 19:05:39,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:05:39,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,631 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 19:05:39,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,651 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:05:39,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:05:39,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,785 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 19:05:39,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,807 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:05:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:05:39,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:39,930 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 19:05:39,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:39,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:05:39,956 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-02-19 19:05:40,170 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 19:05:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:40,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:40,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-02-19 19:05:40,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593474089] [2021-02-19 19:05:40,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:05:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:05:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:05:40,311 INFO L87 Difference]: Start difference. First operand 1392 states and 4613 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:40,928 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-02-19 19:05:41,108 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-02-19 19:05:41,305 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-02-19 19:05:41,447 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 19:05:41,664 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-02-19 19:05:41,808 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-02-19 19:05:42,047 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 19:05:42,482 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 19:05:42,756 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-02-19 19:05:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:43,131 INFO L93 Difference]: Finished difference Result 1818 states and 5888 transitions. [2021-02-19 19:05:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:05:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:43,133 INFO L225 Difference]: With dead ends: 1818 [2021-02-19 19:05:43,133 INFO L226 Difference]: Without dead ends: 1803 [2021-02-19 19:05:43,134 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:05:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-02-19 19:05:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1395. [2021-02-19 19:05:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.317790530846485) internal successors, (4625), 1394 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4625 transitions. [2021-02-19 19:05:43,150 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4625 transitions. Word has length 26 [2021-02-19 19:05:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:43,150 INFO L480 AbstractCegarLoop]: Abstraction has 1395 states and 4625 transitions. [2021-02-19 19:05:43,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4625 transitions. [2021-02-19 19:05:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:43,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:43,152 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:43,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-02-19 19:05:43,353 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-02-19 19:05:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:43,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498765521] [2021-02-19 19:05:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:43,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498765521] [2021-02-19 19:05:43,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734106172] [2021-02-19 19:05:43,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:43,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:05:43,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:05:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:44,336 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 19:05:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:44,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:44,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:44,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,776 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-02-19 19:05:44,776 INFO L628 ElimStorePlain]: treesize reduction 119, result has 56.1 percent of original size [2021-02-19 19:05:44,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:44,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:44,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 19:05:44,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:44,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:44,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:44,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:44,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:44,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:44,974 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:309, output treesize:51 [2021-02-19 19:05:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:45,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:45,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:05:45,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730986352] [2021-02-19 19:05:45,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:05:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:05:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:05:45,033 INFO L87 Difference]: Start difference. First operand 1395 states and 4625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:45,505 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 29 [2021-02-19 19:05:45,901 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 19:05:46,201 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-02-19 19:05:46,406 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-02-19 19:05:46,800 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2021-02-19 19:05:47,120 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-02-19 19:05:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:47,179 INFO L93 Difference]: Finished difference Result 1953 states and 6287 transitions. [2021-02-19 19:05:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:05:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:47,182 INFO L225 Difference]: With dead ends: 1953 [2021-02-19 19:05:47,182 INFO L226 Difference]: Without dead ends: 1938 [2021-02-19 19:05:47,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:05:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-02-19 19:05:47,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1413. [2021-02-19 19:05:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3222379603399435) internal successors, (4691), 1412 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4691 transitions. [2021-02-19 19:05:47,199 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4691 transitions. Word has length 26 [2021-02-19 19:05:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:47,199 INFO L480 AbstractCegarLoop]: Abstraction has 1413 states and 4691 transitions. [2021-02-19 19:05:47,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4691 transitions. [2021-02-19 19:05:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:47,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:47,201 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:47,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:47,401 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-02-19 19:05:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678283772] [2021-02-19 19:05:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678283772] [2021-02-19 19:05:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244464026] [2021-02-19 19:05:47,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:47,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:05:47,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:05:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:48,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:48,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:48,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:48,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-02-19 19:05:48,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:48,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:48,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:48,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:48,304 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:05:48,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:48,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:48,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:48,331 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:05:48,338 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:48,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:48,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:48,427 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-02-19 19:05:48,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:05:48,429 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-02-19 19:05:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:48,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:48,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 19:05:48,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693707901] [2021-02-19 19:05:48,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:05:48,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:05:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:05:48,494 INFO L87 Difference]: Start difference. First operand 1413 states and 4691 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:49,173 INFO L93 Difference]: Finished difference Result 1723 states and 5644 transitions. [2021-02-19 19:05:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:05:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:49,176 INFO L225 Difference]: With dead ends: 1723 [2021-02-19 19:05:49,176 INFO L226 Difference]: Without dead ends: 1708 [2021-02-19 19:05:49,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:05:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-02-19 19:05:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1422. [2021-02-19 19:05:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.326530612244898) internal successors, (4727), 1421 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4727 transitions. [2021-02-19 19:05:49,193 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4727 transitions. Word has length 26 [2021-02-19 19:05:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:49,193 INFO L480 AbstractCegarLoop]: Abstraction has 1422 states and 4727 transitions. [2021-02-19 19:05:49,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4727 transitions. [2021-02-19 19:05:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:49,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:49,196 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:49,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-02-19 19:05:49,396 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-02-19 19:05:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:49,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146486697] [2021-02-19 19:05:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:49,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146486697] [2021-02-19 19:05:49,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250041903] [2021-02-19 19:05:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:49,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:05:49,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:05:49,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,175 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:50,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,184 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:50,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,196 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:05:50,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:05:50,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:05:50,228 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:05:50,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,254 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:05:50,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:50,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:05:50,279 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:05:50,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:05:50,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,315 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 19:05:50,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 19:05:50,326 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,336 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:05:50,337 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,345 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:05:50,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:50,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:50,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:05:50,353 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:50,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:50,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:05:50,445 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-02-19 19:05:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:50,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:50,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:05:50,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581797258] [2021-02-19 19:05:50,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:05:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:05:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:05:50,666 INFO L87 Difference]: Start difference. First operand 1422 states and 4727 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:51,168 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2021-02-19 19:05:51,405 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-02-19 19:05:51,898 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2021-02-19 19:05:52,079 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-02-19 19:05:52,260 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 19:05:52,553 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-02-19 19:05:52,694 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 19:05:52,976 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-02-19 19:05:53,272 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-02-19 19:05:53,780 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-02-19 19:05:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:54,045 INFO L93 Difference]: Finished difference Result 2353 states and 7563 transitions. [2021-02-19 19:05:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:05:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:54,049 INFO L225 Difference]: With dead ends: 2353 [2021-02-19 19:05:54,049 INFO L226 Difference]: Without dead ends: 2323 [2021-02-19 19:05:54,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:05:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-02-19 19:05:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1422. [2021-02-19 19:05:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.326530612244898) internal successors, (4727), 1421 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4727 transitions. [2021-02-19 19:05:54,069 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4727 transitions. Word has length 26 [2021-02-19 19:05:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:54,069 INFO L480 AbstractCegarLoop]: Abstraction has 1422 states and 4727 transitions. [2021-02-19 19:05:54,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4727 transitions. [2021-02-19 19:05:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:54,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:54,071 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:54,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-02-19 19:05:54,272 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1627125609, now seen corresponding path program 12 times [2021-02-19 19:05:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:54,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104636288] [2021-02-19 19:05:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104636288] [2021-02-19 19:05:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5874143] [2021-02-19 19:05:54,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:54,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:05:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:05:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,056 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:55,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-02-19 19:05:55,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,099 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:55,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-02-19 19:05:55,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:55,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-02-19 19:05:55,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,144 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:55,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:55,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-02-19 19:05:55,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-02-19 19:05:55,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:55,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:55,235 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,247 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:05:55,248 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:55,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-02-19 19:05:55,265 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:05:55,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:55,279 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-02-19 19:05:55,296 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:55,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:55,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:05:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-02-19 19:05:55,308 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:55,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:05:55,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:05:55,387 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-02-19 19:05:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:55,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:55,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:05:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757464397] [2021-02-19 19:05:55,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:05:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:05:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:05:55,593 INFO L87 Difference]: Start difference. First operand 1422 states and 4727 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:56,238 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 19:05:56,622 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-02-19 19:05:56,761 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 19:05:57,078 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-02-19 19:05:57,497 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-02-19 19:05:57,642 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-02-19 19:05:58,109 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-02-19 19:05:58,332 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-02-19 19:05:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:05:58,435 INFO L93 Difference]: Finished difference Result 2000 states and 6520 transitions. [2021-02-19 19:05:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:05:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:05:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:05:58,439 INFO L225 Difference]: With dead ends: 2000 [2021-02-19 19:05:58,439 INFO L226 Difference]: Without dead ends: 1985 [2021-02-19 19:05:58,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:05:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-02-19 19:05:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1422. [2021-02-19 19:05:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.326530612244898) internal successors, (4727), 1421 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4727 transitions. [2021-02-19 19:05:58,458 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4727 transitions. Word has length 26 [2021-02-19 19:05:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:05:58,458 INFO L480 AbstractCegarLoop]: Abstraction has 1422 states and 4727 transitions. [2021-02-19 19:05:58,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:05:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4727 transitions. [2021-02-19 19:05:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:05:58,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:05:58,460 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:05:58,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:05:58,660 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:05:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:05:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-02-19 19:05:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:05:58,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421833690] [2021-02-19 19:05:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:05:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:05:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421833690] [2021-02-19 19:05:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277421514] [2021-02-19 19:05:59,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:59,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:05:59,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:05:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:05:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:05:59,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:59,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:05:59,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-02-19 19:05:59,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:59,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:05:59,820 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:59,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:05:59,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:05:59,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-02-19 19:05:59,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:05:59,872 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:05:59,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-02-19 19:05:59,892 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-02-19 19:05:59,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:05:59,911 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:05:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:05:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:05:59,916 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:05:59,943 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-02-19 19:05:59,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:05:59,945 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-02-19 19:05:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:05:59,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:05:59,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:05:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348147652] [2021-02-19 19:05:59,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:05:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:05:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:05:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:05:59,988 INFO L87 Difference]: Start difference. First operand 1422 states and 4727 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:00,376 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 19:06:00,601 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 19:06:00,934 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-02-19 19:06:01,111 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 19:06:01,308 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-02-19 19:06:01,944 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 19:06:02,404 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-02-19 19:06:02,654 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-02-19 19:06:03,296 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-02-19 19:06:03,473 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-02-19 19:06:03,635 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2021-02-19 19:06:03,931 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-02-19 19:06:04,118 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-02-19 19:06:04,292 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-02-19 19:06:04,481 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-02-19 19:06:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:04,809 INFO L93 Difference]: Finished difference Result 3144 states and 9812 transitions. [2021-02-19 19:06:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:06:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:04,813 INFO L225 Difference]: With dead ends: 3144 [2021-02-19 19:06:04,813 INFO L226 Difference]: Without dead ends: 3099 [2021-02-19 19:06:04,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=638, Invalid=3268, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:06:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-02-19 19:06:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1441. [2021-02-19 19:06:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.345138888888889) internal successors, (4817), 1440 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4817 transitions. [2021-02-19 19:06:04,836 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4817 transitions. Word has length 26 [2021-02-19 19:06:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:04,836 INFO L480 AbstractCegarLoop]: Abstraction has 1441 states and 4817 transitions. [2021-02-19 19:06:04,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4817 transitions. [2021-02-19 19:06:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:04,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:04,838 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:05,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:05,039 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-02-19 19:06:05,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:05,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118326055] [2021-02-19 19:06:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118326055] [2021-02-19 19:06:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756743762] [2021-02-19 19:06:05,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:05,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:06:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:06:05,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 19:06:06,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-02-19 19:06:06,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:06:06,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:06:06,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:06:06,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-02-19 19:06:06,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:06:06,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 19:06:06,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:06:06,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:06:06,331 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-02-19 19:06:06,341 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:06:06,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:06:06,361 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-02-19 19:06:06,370 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-02-19 19:06:06,380 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:06,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:06:06,386 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:06,449 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-02-19 19:06:06,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:06:06,450 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-02-19 19:06:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:06,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:06,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:06:06,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447504834] [2021-02-19 19:06:06,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:06:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:06:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:06:06,491 INFO L87 Difference]: Start difference. First operand 1441 states and 4817 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:06,865 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 19:06:07,092 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 19:06:07,492 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-02-19 19:06:07,663 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2021-02-19 19:06:08,230 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 19:06:08,412 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 19:06:08,794 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2021-02-19 19:06:09,168 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-02-19 19:06:09,590 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-02-19 19:06:09,747 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-02-19 19:06:09,920 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-02-19 19:06:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:10,171 INFO L93 Difference]: Finished difference Result 2913 states and 9206 transitions. [2021-02-19 19:06:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:06:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:10,175 INFO L225 Difference]: With dead ends: 2913 [2021-02-19 19:06:10,175 INFO L226 Difference]: Without dead ends: 2868 [2021-02-19 19:06:10,175 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:06:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-02-19 19:06:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1444. [2021-02-19 19:06:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.3471933471933473) internal successors, (4830), 1443 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4830 transitions. [2021-02-19 19:06:10,196 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4830 transitions. Word has length 26 [2021-02-19 19:06:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 4830 transitions. [2021-02-19 19:06:10,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4830 transitions. [2021-02-19 19:06:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:10,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:10,198 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:10,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:10,399 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-02-19 19:06:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:10,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982522250] [2021-02-19 19:06:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:10,734 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 19:06:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:10,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982522250] [2021-02-19 19:06:10,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363107660] [2021-02-19 19:06:10,948 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 19:06:10,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:06:10,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:10,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:06:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:11,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,501 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:06:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 19:06:11,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:11,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-02-19 19:06:11,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,579 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-02-19 19:06:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-02-19 19:06:11,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,610 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-02-19 19:06:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-02-19 19:06:11,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,628 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:06:11,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,645 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-02-19 19:06:11,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,671 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-02-19 19:06:11,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-02-19 19:06:11,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,690 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:06:11,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,708 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:06:11,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,726 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-02-19 19:06:11,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,743 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-02-19 19:06:11,744 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,768 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-02-19 19:06:11,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-02-19 19:06:11,770 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,786 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-02-19 19:06:11,787 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,802 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:06:11,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,818 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:06:11,819 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:11,828 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:06:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:06:11,829 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:11,989 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:06:11,990 INFO L628 ElimStorePlain]: treesize reduction 39, result has 73.5 percent of original size [2021-02-19 19:06:11,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:06:11,991 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-02-19 19:06:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:12,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:12,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:06:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439373202] [2021-02-19 19:06:12,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:06:12,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:06:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:06:12,100 INFO L87 Difference]: Start difference. First operand 1444 states and 4830 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:12,525 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-02-19 19:06:12,776 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 19:06:13,178 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-02-19 19:06:13,363 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2021-02-19 19:06:14,017 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-02-19 19:06:14,195 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 19:06:14,601 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2021-02-19 19:06:15,079 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 57 [2021-02-19 19:06:15,463 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-02-19 19:06:15,675 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2021-02-19 19:06:15,864 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-02-19 19:06:16,071 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-02-19 19:06:16,323 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2021-02-19 19:06:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:16,996 INFO L93 Difference]: Finished difference Result 3346 states and 10398 transitions. [2021-02-19 19:06:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:06:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:17,001 INFO L225 Difference]: With dead ends: 3346 [2021-02-19 19:06:17,001 INFO L226 Difference]: Without dead ends: 3286 [2021-02-19 19:06:17,001 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:06:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-02-19 19:06:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1457. [2021-02-19 19:06:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.3585164835164836) internal successors, (4890), 1456 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4890 transitions. [2021-02-19 19:06:17,024 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4890 transitions. Word has length 26 [2021-02-19 19:06:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:17,024 INFO L480 AbstractCegarLoop]: Abstraction has 1457 states and 4890 transitions. [2021-02-19 19:06:17,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4890 transitions. [2021-02-19 19:06:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:17,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:17,027 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:17,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable823 [2021-02-19 19:06:17,227 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-02-19 19:06:17,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:17,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860634442] [2021-02-19 19:06:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:17,569 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 19:06:17,682 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 19:06:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:17,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860634442] [2021-02-19 19:06:17,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071412727] [2021-02-19 19:06:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:06:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:18,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:06:18,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:18,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:18,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:18,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:18,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:18,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:18,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:18,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:18,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:06:18,256 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:18,262 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:18,268 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:18,274 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:18,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:18,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-02-19 19:06:18,279 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:18,360 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-02-19 19:06:18,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:06:18,361 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-02-19 19:06:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:18,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:18,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:06:18,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827416542] [2021-02-19 19:06:18,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:06:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:06:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:06:18,420 INFO L87 Difference]: Start difference. First operand 1457 states and 4890 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:19,042 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-02-19 19:06:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:19,431 INFO L93 Difference]: Finished difference Result 1840 states and 6049 transitions. [2021-02-19 19:06:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:06:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:19,434 INFO L225 Difference]: With dead ends: 1840 [2021-02-19 19:06:19,434 INFO L226 Difference]: Without dead ends: 1825 [2021-02-19 19:06:19,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:06:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-02-19 19:06:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1457. [2021-02-19 19:06:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.3585164835164836) internal successors, (4890), 1456 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4890 transitions. [2021-02-19 19:06:19,452 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4890 transitions. Word has length 26 [2021-02-19 19:06:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:19,452 INFO L480 AbstractCegarLoop]: Abstraction has 1457 states and 4890 transitions. [2021-02-19 19:06:19,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4890 transitions. [2021-02-19 19:06:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:19,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:19,454 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:19,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:19,655 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 14 times [2021-02-19 19:06:19,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:19,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486082130] [2021-02-19 19:06:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:19,925 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 19:06:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:20,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486082130] [2021-02-19 19:06:20,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491575179] [2021-02-19 19:06:20,168 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 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 19:06:20,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:06:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:06:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:20,794 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-02-19 19:06:20,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-02-19 19:06:20,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:20,822 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-02-19 19:06:20,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:06:20,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:20,998 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 19:06:20,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:21,029 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:06:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 19:06:21,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,059 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:06:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-02-19 19:06:21,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,233 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 19:06:21,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:21,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-02-19 19:06:21,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,301 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:06:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 19:06:21,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,465 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 19:06:21,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:21,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-02-19 19:06:21,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,518 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-02-19 19:06:21,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-02-19 19:06:21,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:21,828 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 19:06:21,829 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.2 percent of original size [2021-02-19 19:06:21,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:06:21,856 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:822 [2021-02-19 19:06:22,316 WARN L202 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-02-19 19:06:22,620 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-02-19 19:06:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:22,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:22,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:06:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605462851] [2021-02-19 19:06:22,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:06:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:06:22,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:06:22,755 INFO L87 Difference]: Start difference. First operand 1457 states and 4890 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:23,058 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 27 [2021-02-19 19:06:23,431 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-02-19 19:06:23,917 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2021-02-19 19:06:24,098 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-02-19 19:06:24,334 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 19:06:24,788 WARN L202 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2021-02-19 19:06:25,193 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 59 [2021-02-19 19:06:25,794 WARN L202 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 77 [2021-02-19 19:06:26,134 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 58 [2021-02-19 19:06:26,384 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-02-19 19:06:26,863 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-02-19 19:06:27,242 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-02-19 19:06:27,810 WARN L202 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 59 [2021-02-19 19:06:28,313 WARN L202 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-02-19 19:06:28,581 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-02-19 19:06:29,009 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 75 [2021-02-19 19:06:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:29,111 INFO L93 Difference]: Finished difference Result 2100 states and 6748 transitions. [2021-02-19 19:06:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:06:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:29,114 INFO L225 Difference]: With dead ends: 2100 [2021-02-19 19:06:29,114 INFO L226 Difference]: Without dead ends: 2085 [2021-02-19 19:06:29,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:06:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-02-19 19:06:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1461. [2021-02-19 19:06:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3636986301369864) internal successors, (4911), 1460 states have internal predecessors, (4911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4911 transitions. [2021-02-19 19:06:29,132 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4911 transitions. Word has length 26 [2021-02-19 19:06:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:29,132 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 4911 transitions. [2021-02-19 19:06:29,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4911 transitions. [2021-02-19 19:06:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:29,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:29,134 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:29,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:29,349 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1175939077, now seen corresponding path program 15 times [2021-02-19 19:06:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:29,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099078415] [2021-02-19 19:06:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099078415] [2021-02-19 19:06:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951692626] [2021-02-19 19:06:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:29,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:06:29,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:06:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:30,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:06:30,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:06:30,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-02-19 19:06:30,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:06:30,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:30,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:30,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,367 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 19:06:30,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,388 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-02-19 19:06:30,389 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:06:30,402 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,415 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:06:30,417 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:06:30,432 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:06:30,446 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,455 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:30,456 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:30,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:30,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:30,473 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:30,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:30,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:06:30,571 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-02-19 19:06:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:30,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:30,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:06:30,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33032745] [2021-02-19 19:06:30,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:06:30,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:30,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:06:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:06:30,797 INFO L87 Difference]: Start difference. First operand 1461 states and 4911 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:31,362 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 19:06:31,637 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 19:06:31,926 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-02-19 19:06:32,208 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 19:06:32,388 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-02-19 19:06:32,669 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 19:06:32,924 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 19:06:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:32,990 INFO L93 Difference]: Finished difference Result 2001 states and 6565 transitions. [2021-02-19 19:06:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:06:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:32,994 INFO L225 Difference]: With dead ends: 2001 [2021-02-19 19:06:32,994 INFO L226 Difference]: Without dead ends: 1986 [2021-02-19 19:06:32,994 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:06:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-02-19 19:06:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1458. [2021-02-19 19:06:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.3603294440631433) internal successors, (4896), 1457 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4896 transitions. [2021-02-19 19:06:33,013 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4896 transitions. Word has length 26 [2021-02-19 19:06:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:33,013 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 4896 transitions. [2021-02-19 19:06:33,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4896 transitions. [2021-02-19 19:06:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:33,015 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:33,015 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:33,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-02-19 19:06:33,215 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1368330285, now seen corresponding path program 16 times [2021-02-19 19:06:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:33,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602494834] [2021-02-19 19:06:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:33,523 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-02-19 19:06:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602494834] [2021-02-19 19:06:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658266960] [2021-02-19 19:06:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:33,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:06:33,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:06:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:34,305 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-02-19 19:06:34,596 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-02-19 19:06:34,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:34,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:34,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:34,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:34,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:34,872 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 19:06:34,872 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-02-19 19:06:34,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:34,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:34,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:34,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:34,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:34,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:34,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:06:34,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-02-19 19:06:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:35,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:35,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:06:35,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838306573] [2021-02-19 19:06:35,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:06:35,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:06:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:06:35,060 INFO L87 Difference]: Start difference. First operand 1458 states and 4896 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:35,800 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-02-19 19:06:36,514 WARN L202 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 130 [2021-02-19 19:06:36,719 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-02-19 19:06:36,986 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-02-19 19:06:37,696 WARN L202 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 112 [2021-02-19 19:06:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:37,794 INFO L93 Difference]: Finished difference Result 1983 states and 6521 transitions. [2021-02-19 19:06:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:06:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:37,798 INFO L225 Difference]: With dead ends: 1983 [2021-02-19 19:06:37,798 INFO L226 Difference]: Without dead ends: 1968 [2021-02-19 19:06:37,798 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:06:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-02-19 19:06:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1461. [2021-02-19 19:06:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.361643835616438) internal successors, (4908), 1460 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4908 transitions. [2021-02-19 19:06:37,816 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4908 transitions. Word has length 26 [2021-02-19 19:06:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:37,816 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 4908 transitions. [2021-02-19 19:06:37,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4908 transitions. [2021-02-19 19:06:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:37,818 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:37,818 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:38,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:38,018 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1309104231, now seen corresponding path program 17 times [2021-02-19 19:06:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:38,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580693980] [2021-02-19 19:06:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580693980] [2021-02-19 19:06:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123569343] [2021-02-19 19:06:38,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:38,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:06:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:06:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:38,881 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:06:38,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:38,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:38,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 19:06:38,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,072 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 19:06:39,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:06:39,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,211 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 19:06:39,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:06:39,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,346 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 19:06:39,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:06:39,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,484 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-19 19:06:39,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:39,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:06:39,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,616 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 19:06:39,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:06:39,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,763 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 19:06:39,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:06:39,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:39,885 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 19:06:39,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:39,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:39,898 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:39,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:06:39,900 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:40,004 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:06:40,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:40,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:06:40,010 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-02-19 19:06:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:40,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:40,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:06:40,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732851938] [2021-02-19 19:06:40,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:06:40,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:06:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:06:40,236 INFO L87 Difference]: Start difference. First operand 1461 states and 4908 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:41,160 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-02-19 19:06:41,353 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-02-19 19:06:41,587 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-02-19 19:06:41,992 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:06:42,418 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 19:06:43,004 WARN L202 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-02-19 19:06:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:43,530 INFO L93 Difference]: Finished difference Result 2057 states and 6699 transitions. [2021-02-19 19:06:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:06:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:43,533 INFO L225 Difference]: With dead ends: 2057 [2021-02-19 19:06:43,533 INFO L226 Difference]: Without dead ends: 2027 [2021-02-19 19:06:43,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:06:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-02-19 19:06:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1455. [2021-02-19 19:06:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.359009628610729) internal successors, (4884), 1454 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4884 transitions. [2021-02-19 19:06:43,551 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4884 transitions. Word has length 26 [2021-02-19 19:06:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:43,551 INFO L480 AbstractCegarLoop]: Abstraction has 1455 states and 4884 transitions. [2021-02-19 19:06:43,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4884 transitions. [2021-02-19 19:06:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:43,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:43,553 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:43,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:43,762 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 18 times [2021-02-19 19:06:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:43,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760587895] [2021-02-19 19:06:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:43,965 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-02-19 19:06:44,085 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-02-19 19:06:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760587895] [2021-02-19 19:06:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882431217] [2021-02-19 19:06:44,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:44,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:06:44,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:06:44,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:44,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:44,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:44,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:44,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:44,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:06:44,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:44,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-02-19 19:06:44,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:44,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:44,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-02-19 19:06:44,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:44,833 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:44,840 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-02-19 19:06:44,848 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:44,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 19:06:44,852 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:44,943 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-02-19 19:06:44,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:06:44,945 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-02-19 19:06:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:45,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:45,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:06:45,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652212647] [2021-02-19 19:06:45,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:06:45,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:06:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:06:45,014 INFO L87 Difference]: Start difference. First operand 1455 states and 4884 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:46,038 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-19 19:06:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:46,483 INFO L93 Difference]: Finished difference Result 1946 states and 6345 transitions. [2021-02-19 19:06:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:06:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:46,486 INFO L225 Difference]: With dead ends: 1946 [2021-02-19 19:06:46,486 INFO L226 Difference]: Without dead ends: 1921 [2021-02-19 19:06:46,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:06:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-02-19 19:06:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1490. [2021-02-19 19:06:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.354600402955003) internal successors, (4995), 1489 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4995 transitions. [2021-02-19 19:06:46,503 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4995 transitions. Word has length 26 [2021-02-19 19:06:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:46,503 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4995 transitions. [2021-02-19 19:06:46,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4995 transitions. [2021-02-19 19:06:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:46,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:46,505 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:46,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-02-19 19:06:46,720 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 19 times [2021-02-19 19:06:46,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:46,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657303430] [2021-02-19 19:06:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657303430] [2021-02-19 19:06:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414140990] [2021-02-19 19:06:47,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:06:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,455 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:06:47,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-02-19 19:06:47,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-02-19 19:06:47,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 19:06:47,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,521 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 19:06:47,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,535 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-02-19 19:06:47,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,547 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-02-19 19:06:47,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-02-19 19:06:47,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,580 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-02-19 19:06:47,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,592 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-02-19 19:06:47,593 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-02-19 19:06:47,605 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-02-19 19:06:47,620 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-02-19 19:06:47,638 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-02-19 19:06:47,654 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,667 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:06:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-02-19 19:06:47,669 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:47,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:06:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-02-19 19:06:47,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:47,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:47,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:06:47,769 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-02-19 19:06:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:48,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:48,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:06:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301928391] [2021-02-19 19:06:48,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:06:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:06:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:06:48,020 INFO L87 Difference]: Start difference. First operand 1490 states and 4995 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:49,187 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-02-19 19:06:49,365 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-02-19 19:06:49,604 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-02-19 19:06:49,867 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2021-02-19 19:06:50,049 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 19:06:50,373 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 19:06:50,598 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-02-19 19:06:50,913 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-02-19 19:06:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:51,020 INFO L93 Difference]: Finished difference Result 2333 states and 7484 transitions. [2021-02-19 19:06:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:06:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:51,024 INFO L225 Difference]: With dead ends: 2333 [2021-02-19 19:06:51,024 INFO L226 Difference]: Without dead ends: 2283 [2021-02-19 19:06:51,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:06:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-02-19 19:06:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1512. [2021-02-19 19:06:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.3606882859033753) internal successors, (5078), 1511 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5078 transitions. [2021-02-19 19:06:51,045 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5078 transitions. Word has length 26 [2021-02-19 19:06:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:51,045 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5078 transitions. [2021-02-19 19:06:51,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5078 transitions. [2021-02-19 19:06:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:51,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:51,047 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:51,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-02-19 19:06:51,261 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 20 times [2021-02-19 19:06:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:51,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631465931] [2021-02-19 19:06:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:51,536 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-02-19 19:06:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631465931] [2021-02-19 19:06:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9720518] [2021-02-19 19:06:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:06:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:06:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:52,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-02-19 19:06:52,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:52,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,246 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:06:52,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:06:52,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:52,571 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-02-19 19:06:52,572 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.2 percent of original size [2021-02-19 19:06:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,597 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:06:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:06:52,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:06:52,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:52,780 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:06:52,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,807 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:06:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-02-19 19:06:52,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:52,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:52,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:06:52,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:53,127 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 19:06:53,127 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-02-19 19:06:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:53,153 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:06:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:06:53,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:53,181 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:06:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:06:53,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:53,323 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:06:53,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:53,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:06:53,346 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:256 [2021-02-19 19:06:53,597 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 19:06:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:53,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:53,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:06:53,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170702067] [2021-02-19 19:06:53,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:06:53,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:53,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:06:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:06:53,715 INFO L87 Difference]: Start difference. First operand 1512 states and 5078 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:54,307 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 19:06:54,805 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 19:06:55,037 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-02-19 19:06:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:55,103 INFO L93 Difference]: Finished difference Result 1721 states and 5683 transitions. [2021-02-19 19:06:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:06:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:55,106 INFO L225 Difference]: With dead ends: 1721 [2021-02-19 19:06:55,106 INFO L226 Difference]: Without dead ends: 1696 [2021-02-19 19:06:55,106 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:06:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-02-19 19:06:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1525. [2021-02-19 19:06:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.3667979002624673) internal successors, (5131), 1524 states have internal predecessors, (5131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5131 transitions. [2021-02-19 19:06:55,122 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5131 transitions. Word has length 26 [2021-02-19 19:06:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:55,122 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 5131 transitions. [2021-02-19 19:06:55,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5131 transitions. [2021-02-19 19:06:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:55,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:55,124 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:55,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:55,326 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:55,326 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-02-19 19:06:55,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:55,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033735678] [2021-02-19 19:06:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:55,546 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-02-19 19:06:55,668 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-02-19 19:06:55,781 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-02-19 19:06:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033735678] [2021-02-19 19:06:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915175647] [2021-02-19 19:06:55,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:55,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:06:55,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:06:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:06:56,439 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:06:56,746 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-02-19 19:06:56,820 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_91], 2=[A, v_prenex_90]} [2021-02-19 19:06:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:56,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:56,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:56,958 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:06:56,958 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-02-19 19:06:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:56,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:56,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:06:56,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:56,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:56,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:57,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:06:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:06:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:06:57,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:06:57,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:06:57,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:06:57,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-02-19 19:06:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:57,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:06:57,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:06:57,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478296118] [2021-02-19 19:06:57,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:06:57,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:06:57,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:06:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:06:57,146 INFO L87 Difference]: Start difference. First operand 1525 states and 5131 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:57,602 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:06:57,785 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-02-19 19:06:58,178 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 19:06:58,480 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-02-19 19:06:58,665 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 19:06:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:06:58,854 INFO L93 Difference]: Finished difference Result 2105 states and 6854 transitions. [2021-02-19 19:06:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:06:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:06:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:06:58,858 INFO L225 Difference]: With dead ends: 2105 [2021-02-19 19:06:58,858 INFO L226 Difference]: Without dead ends: 2060 [2021-02-19 19:06:58,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:06:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-02-19 19:06:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1569. [2021-02-19 19:06:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3743622448979593) internal successors, (5291), 1568 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5291 transitions. [2021-02-19 19:06:58,877 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5291 transitions. Word has length 26 [2021-02-19 19:06:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:06:58,877 INFO L480 AbstractCegarLoop]: Abstraction has 1569 states and 5291 transitions. [2021-02-19 19:06:58,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:06:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5291 transitions. [2021-02-19 19:06:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:06:58,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:06:58,879 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:06:59,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:59,080 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:06:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:06:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-02-19 19:06:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:06:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649292248] [2021-02-19 19:06:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:06:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:06:59,559 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-02-19 19:06:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:06:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649292248] [2021-02-19 19:06:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531915093] [2021-02-19 19:06:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:06:59,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:06:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:06:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:06:59,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:07:00,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-02-19 19:07:00,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,055 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:07:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-02-19 19:07:00,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:07:00,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-02-19 19:07:00,090 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,103 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:07:00,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:07:00,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-02-19 19:07:00,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-02-19 19:07:00,161 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,176 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:07:00,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,191 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:07:00,192 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-02-19 19:07:00,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:07:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-02-19 19:07:00,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,240 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:07:00,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:07:00,241 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-02-19 19:07:00,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:00,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:07:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-02-19 19:07:00,271 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:00,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:00,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:07:00,361 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-02-19 19:07:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:00,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:00,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:07:00,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067536251] [2021-02-19 19:07:00,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:07:00,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:07:00,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:07:00,602 INFO L87 Difference]: Start difference. First operand 1569 states and 5291 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:01,354 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-02-19 19:07:01,820 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-02-19 19:07:02,076 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-02-19 19:07:02,330 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 19:07:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:02,471 INFO L93 Difference]: Finished difference Result 1982 states and 6544 transitions. [2021-02-19 19:07:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:07:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:02,475 INFO L225 Difference]: With dead ends: 1982 [2021-02-19 19:07:02,475 INFO L226 Difference]: Without dead ends: 1963 [2021-02-19 19:07:02,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:07:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-02-19 19:07:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1560. [2021-02-19 19:07:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.371391917896087) internal successors, (5256), 1559 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5256 transitions. [2021-02-19 19:07:02,494 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5256 transitions. Word has length 26 [2021-02-19 19:07:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:02,494 INFO L480 AbstractCegarLoop]: Abstraction has 1560 states and 5256 transitions. [2021-02-19 19:07:02,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5256 transitions. [2021-02-19 19:07:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:02,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:02,496 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:02,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:02,697 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-02-19 19:07:02,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:02,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911164955] [2021-02-19 19:07:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911164955] [2021-02-19 19:07:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753717512] [2021-02-19 19:07:03,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:03,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:07:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:07:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:07:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:03,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:03,868 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-02-19 19:07:03,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:03,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:07:03,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,272 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-02-19 19:07:04,272 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.6 percent of original size [2021-02-19 19:07:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,301 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:07:04,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,330 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:04,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:07:04,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,509 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 19:07:04,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,533 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:07:04,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:04,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-02-19 19:07:04,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,881 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-02-19 19:07:04,881 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-02-19 19:07:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,906 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:07:04,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:04,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:04,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:07:04,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:05,081 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:07:05,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:05,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:07:05,099 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-02-19 19:07:05,337 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 19:07:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:05,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:05,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:07:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216142352] [2021-02-19 19:07:05,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:07:05,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:05,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:07:05,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:07:05,465 INFO L87 Difference]: Start difference. First operand 1560 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:05,641 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 27 [2021-02-19 19:07:06,234 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-02-19 19:07:06,693 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-02-19 19:07:07,281 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:07:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:07,350 INFO L93 Difference]: Finished difference Result 2074 states and 6840 transitions. [2021-02-19 19:07:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:07:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:07,354 INFO L225 Difference]: With dead ends: 2074 [2021-02-19 19:07:07,354 INFO L226 Difference]: Without dead ends: 2049 [2021-02-19 19:07:07,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:07:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-02-19 19:07:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1560. [2021-02-19 19:07:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.371391917896087) internal successors, (5256), 1559 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5256 transitions. [2021-02-19 19:07:07,384 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5256 transitions. Word has length 26 [2021-02-19 19:07:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:07,384 INFO L480 AbstractCegarLoop]: Abstraction has 1560 states and 5256 transitions. [2021-02-19 19:07:07,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5256 transitions. [2021-02-19 19:07:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:07,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:07,386 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:07,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-02-19 19:07:07,586 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-02-19 19:07:07,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:07,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343549880] [2021-02-19 19:07:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343549880] [2021-02-19 19:07:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661702789] [2021-02-19 19:07:08,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:08,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:07:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:07:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:07:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 19:07:08,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-02-19 19:07:08,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-02-19 19:07:08,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-02-19 19:07:08,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:07:08,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:07:08,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:07:08,829 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:07:08,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:07:08,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:07:08,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:07:08,874 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:07:08,885 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-02-19 19:07:08,897 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:07:08,908 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:07:08,919 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:08,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-02-19 19:07:08,926 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:08,965 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-02-19 19:07:08,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:07:08,967 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-02-19 19:07:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:09,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:09,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:07:09,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441483153] [2021-02-19 19:07:09,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:07:09,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:07:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:07:09,008 INFO L87 Difference]: Start difference. First operand 1560 states and 5256 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:09,595 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 19:07:10,369 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 19:07:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:10,473 INFO L93 Difference]: Finished difference Result 1993 states and 6540 transitions. [2021-02-19 19:07:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:07:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:10,477 INFO L225 Difference]: With dead ends: 1993 [2021-02-19 19:07:10,477 INFO L226 Difference]: Without dead ends: 1967 [2021-02-19 19:07:10,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:07:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-02-19 19:07:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1564. [2021-02-19 19:07:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.369161868202175) internal successors, (5266), 1563 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5266 transitions. [2021-02-19 19:07:10,495 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5266 transitions. Word has length 26 [2021-02-19 19:07:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:10,495 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 5266 transitions. [2021-02-19 19:07:10,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5266 transitions. [2021-02-19 19:07:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:10,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:10,497 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:10,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-02-19 19:07:10,697 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-02-19 19:07:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:10,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799338412] [2021-02-19 19:07:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:11,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799338412] [2021-02-19 19:07:11,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52168973] [2021-02-19 19:07:11,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:07:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:11,667 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 19:07:11,731 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_101], 6=[v_prenex_99, v_prenex_103]} [2021-02-19 19:07:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:11,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:11,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 19:07:11,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:11,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:11,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-02-19 19:07:11,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:11,892 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-02-19 19:07:11,893 INFO L628 ElimStorePlain]: treesize reduction 160, result has 46.1 percent of original size [2021-02-19 19:07:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 19:07:11,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:11,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:11,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:11,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 19:07:11,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:12,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:12,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 19:07:12,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:12,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:12,047 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 19:07:12,047 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:357, output treesize:55 [2021-02-19 19:07:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:12,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:12,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:07:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638062073] [2021-02-19 19:07:12,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:07:12,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:07:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:07:12,115 INFO L87 Difference]: Start difference. First operand 1564 states and 5266 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:14,600 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 19:07:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:14,805 INFO L93 Difference]: Finished difference Result 2187 states and 7169 transitions. [2021-02-19 19:07:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:07:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:14,809 INFO L225 Difference]: With dead ends: 2187 [2021-02-19 19:07:14,809 INFO L226 Difference]: Without dead ends: 2172 [2021-02-19 19:07:14,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:07:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-02-19 19:07:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1564. [2021-02-19 19:07:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.369161868202175) internal successors, (5266), 1563 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5266 transitions. [2021-02-19 19:07:14,829 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5266 transitions. Word has length 26 [2021-02-19 19:07:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:14,829 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 5266 transitions. [2021-02-19 19:07:14,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5266 transitions. [2021-02-19 19:07:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:14,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:14,831 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:15,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-02-19 19:07:15,032 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-02-19 19:07:15,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:15,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890021141] [2021-02-19 19:07:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:15,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890021141] [2021-02-19 19:07:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092261318] [2021-02-19 19:07:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:15,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:07:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:07:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:07:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:16,174 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 19:07:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:16,789 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:07:16,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:17,006 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-02-19 19:07:17,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:17,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:07:17,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:17,244 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-02-19 19:07:17,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:17,274 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:17,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:07:17,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:17,472 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-02-19 19:07:17,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:17,500 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:17,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:07:17,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:17,697 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-02-19 19:07:17,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:17,737 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:17,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:07:17,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:17,939 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-02-19 19:07:17,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:17,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:07:17,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:18,160 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-02-19 19:07:18,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:18,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:07:18,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:18,377 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-02-19 19:07:18,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:18,407 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:07:18,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:18,595 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-02-19 19:07:18,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:18,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:07:18,621 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:397, output treesize:564 [2021-02-19 19:07:19,176 WARN L202 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-02-19 19:07:19,399 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 19:07:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:19,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:19,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:07:19,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607555884] [2021-02-19 19:07:19,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:07:19,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:07:19,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:07:19,557 INFO L87 Difference]: Start difference. First operand 1564 states and 5266 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:19,801 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 32 [2021-02-19 19:07:20,133 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 19:07:20,937 WARN L202 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-02-19 19:07:21,161 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2021-02-19 19:07:21,602 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2021-02-19 19:07:21,731 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-02-19 19:07:22,459 WARN L202 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106 [2021-02-19 19:07:22,987 WARN L202 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2021-02-19 19:07:23,605 WARN L202 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 96 [2021-02-19 19:07:24,089 WARN L202 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 69 [2021-02-19 19:07:24,406 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-02-19 19:07:25,055 WARN L202 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2021-02-19 19:07:25,898 WARN L202 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2021-02-19 19:07:26,706 WARN L202 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-02-19 19:07:27,232 WARN L202 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 72 [2021-02-19 19:07:28,328 WARN L202 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 118 [2021-02-19 19:07:29,456 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 145 DAG size of output: 129 [2021-02-19 19:07:30,018 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 81 [2021-02-19 19:07:30,658 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2021-02-19 19:07:31,177 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 51 [2021-02-19 19:07:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:31,271 INFO L93 Difference]: Finished difference Result 2509 states and 7932 transitions. [2021-02-19 19:07:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:07:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:31,276 INFO L225 Difference]: With dead ends: 2509 [2021-02-19 19:07:31,276 INFO L226 Difference]: Without dead ends: 2475 [2021-02-19 19:07:31,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:07:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-02-19 19:07:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1587. [2021-02-19 19:07:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.378940731399748) internal successors, (5359), 1586 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5359 transitions. [2021-02-19 19:07:31,299 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5359 transitions. Word has length 26 [2021-02-19 19:07:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:31,299 INFO L480 AbstractCegarLoop]: Abstraction has 1587 states and 5359 transitions. [2021-02-19 19:07:31,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5359 transitions. [2021-02-19 19:07:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:31,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:31,301 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:31,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1411,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:31,509 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-02-19 19:07:31,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:31,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087003175] [2021-02-19 19:07:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087003175] [2021-02-19 19:07:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88044466] [2021-02-19 19:07:32,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:07:32,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:07:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:07:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:07:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:32,618 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 19:07:33,156 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2021-02-19 19:07:33,616 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_192], 6=[v_prenex_193, v_prenex_194]} [2021-02-19 19:07:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:33,650 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:33,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:07:33,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:33,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:07:33,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:33,971 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 19:07:33,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,006 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:34,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:07:34,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,042 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:34,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:07:34,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,328 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 19:07:34,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,370 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-02-19 19:07:34,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,407 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:07:34,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-02-19 19:07:34,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,672 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 19:07:34,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:34,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 19:07:34,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:07:34,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:07:34,740 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:07:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 19:07:34,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:34,981 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 19:07:34,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:35,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:07:35,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:433, output treesize:374 [2021-02-19 19:07:35,224 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 19:07:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:35,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:35,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:07:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139231990] [2021-02-19 19:07:35,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:07:35,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:07:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:07:35,283 INFO L87 Difference]: Start difference. First operand 1587 states and 5359 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:36,074 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-02-19 19:07:36,489 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-02-19 19:07:36,925 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-02-19 19:07:37,642 WARN L202 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-02-19 19:07:37,771 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-02-19 19:07:37,947 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-02-19 19:07:38,488 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 98 [2021-02-19 19:07:39,008 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-02-19 19:07:39,200 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 19:07:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:07:39,760 INFO L93 Difference]: Finished difference Result 2264 states and 7331 transitions. [2021-02-19 19:07:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:07:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:07:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:07:39,764 INFO L225 Difference]: With dead ends: 2264 [2021-02-19 19:07:39,765 INFO L226 Difference]: Without dead ends: 2242 [2021-02-19 19:07:39,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:07:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-02-19 19:07:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1599. [2021-02-19 19:07:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.38360450563204) internal successors, (5407), 1598 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5407 transitions. [2021-02-19 19:07:39,786 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5407 transitions. Word has length 26 [2021-02-19 19:07:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:07:39,786 INFO L480 AbstractCegarLoop]: Abstraction has 1599 states and 5407 transitions. [2021-02-19 19:07:39,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5407 transitions. [2021-02-19 19:07:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:07:39,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:07:39,788 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:07:40,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-02-19 19:07:40,001 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:07:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:07:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-02-19 19:07:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:07:40,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485753869] [2021-02-19 19:07:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:07:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:07:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485753869] [2021-02-19 19:07:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048836746] [2021-02-19 19:07:40,649 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 19:07:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:07:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:07:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:07:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:07:41,129 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 19:07:41,406 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 19:07:41,779 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-02-19 19:07:42,299 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:07:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-02-19 19:07:42,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:42,399 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:07:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-02-19 19:07:42,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:43,856 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 180 DAG size of output: 169 [2021-02-19 19:07:43,856 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-02-19 19:07:43,954 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:07:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-02-19 19:07:43,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:44,053 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:07:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-02-19 19:07:44,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:44,758 WARN L202 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-02-19 19:07:44,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:44,864 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:07:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-02-19 19:07:44,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:44,968 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:07:44,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-02-19 19:07:44,991 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:47,117 WARN L202 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 170 DAG size of output: 159 [2021-02-19 19:07:47,117 INFO L628 ElimStorePlain]: treesize reduction 38, result has 95.8 percent of original size [2021-02-19 19:07:47,226 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-02-19 19:07:47,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-02-19 19:07:47,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:47,318 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:07:47,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-02-19 19:07:47,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:48,832 WARN L202 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 176 DAG size of output: 166 [2021-02-19 19:07:48,833 INFO L628 ElimStorePlain]: treesize reduction 71, result has 92.6 percent of original size [2021-02-19 19:07:48,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-02-19 19:07:48,926 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:49,011 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-02-19 19:07:49,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-02-19 19:07:49,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:49,726 WARN L202 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-02-19 19:07:49,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:49,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:49,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-02-19 19:07:49,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:49,894 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-02-19 19:07:49,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-02-19 19:07:49,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:51,920 WARN L202 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 163 DAG size of output: 150 [2021-02-19 19:07:51,920 INFO L628 ElimStorePlain]: treesize reduction 67, result has 92.6 percent of original size [2021-02-19 19:07:51,999 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-02-19 19:07:51,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-02-19 19:07:52,006 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:52,090 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-02-19 19:07:52,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-02-19 19:07:52,094 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:52,755 WARN L202 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-02-19 19:07:52,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:07:52,829 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-02-19 19:07:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-02-19 19:07:52,835 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:52,915 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 19:07:52,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-02-19 19:07:52,931 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:07:54,163 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-02-19 19:07:54,164 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-02-19 19:07:54,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-02-19 19:07:54,264 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2401 [2021-02-19 19:07:55,343 WARN L202 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 70 [2021-02-19 19:07:55,610 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-02-19 19:07:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:07:55,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:07:55,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:07:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637228929] [2021-02-19 19:07:55,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:07:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:07:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:07:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:07:55,683 INFO L87 Difference]: Start difference. First operand 1599 states and 5407 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:07:55,971 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-02-19 19:07:57,011 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-02-19 19:07:57,282 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 19:07:57,710 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-02-19 19:07:58,592 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:07:59,146 WARN L202 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 19:07:59,531 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-02-19 19:08:00,739 WARN L202 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 127 [2021-02-19 19:08:01,647 WARN L202 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-02-19 19:08:02,465 WARN L202 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-02-19 19:08:02,733 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 36 [2021-02-19 19:08:03,957 WARN L202 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 85 [2021-02-19 19:08:05,343 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-02-19 19:08:06,773 WARN L202 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 91 [2021-02-19 19:08:07,392 WARN L202 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-02-19 19:08:07,917 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-02-19 19:08:08,139 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 31 [2021-02-19 19:08:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:08:08,325 INFO L93 Difference]: Finished difference Result 2987 states and 9450 transitions. [2021-02-19 19:08:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 19:08:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:08:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:08:08,330 INFO L225 Difference]: With dead ends: 2987 [2021-02-19 19:08:08,330 INFO L226 Difference]: Without dead ends: 2957 [2021-02-19 19:08:08,330 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=659, Invalid=3897, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:08:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-02-19 19:08:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 1622. [2021-02-19 19:08:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.3830968537939543) internal successors, (5484), 1621 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5484 transitions. [2021-02-19 19:08:08,353 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5484 transitions. Word has length 26 [2021-02-19 19:08:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:08:08,353 INFO L480 AbstractCegarLoop]: Abstraction has 1622 states and 5484 transitions. [2021-02-19 19:08:08,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5484 transitions. [2021-02-19 19:08:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:08:08,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:08:08,355 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:08:08,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1534,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:08,556 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:08:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:08:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-02-19 19:08:08,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:08:08,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223862895] [2021-02-19 19:08:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:08:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:08,767 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-02-19 19:08:08,898 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:08:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:09,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223862895] [2021-02-19 19:08:09,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634652701] [2021-02-19 19:08:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:09,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:08:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:08:09,719 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 19:08:10,016 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-02-19 19:08:10,113 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_216], 2=[v_prenex_217, A]} [2021-02-19 19:08:10,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:10,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:08:10,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:10,283 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:08:10,283 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-02-19 19:08:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:10,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:10,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:10,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-02-19 19:08:10,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:08:10,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:10,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:10,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:10,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 19:08:10,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:10,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:10,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:08:10,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-02-19 19:08:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:10,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:08:10,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:08:10,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145471480] [2021-02-19 19:08:10,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:08:10,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:08:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:08:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:08:10,512 INFO L87 Difference]: Start difference. First operand 1622 states and 5484 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:11,174 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 19:08:11,650 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 19:08:11,953 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-02-19 19:08:12,491 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-02-19 19:08:12,957 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 19:08:13,230 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-02-19 19:08:13,888 WARN L202 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 19:08:14,435 WARN L202 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-02-19 19:08:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:08:14,695 INFO L93 Difference]: Finished difference Result 2244 states and 7276 transitions. [2021-02-19 19:08:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:08:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:08:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:08:14,699 INFO L225 Difference]: With dead ends: 2244 [2021-02-19 19:08:14,699 INFO L226 Difference]: Without dead ends: 2229 [2021-02-19 19:08:14,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:08:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-02-19 19:08:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1626. [2021-02-19 19:08:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.3852307692307693) internal successors, (5501), 1625 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5501 transitions. [2021-02-19 19:08:14,718 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5501 transitions. Word has length 26 [2021-02-19 19:08:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:08:14,719 INFO L480 AbstractCegarLoop]: Abstraction has 1626 states and 5501 transitions. [2021-02-19 19:08:14,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5501 transitions. [2021-02-19 19:08:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:08:14,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:08:14,720 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:08:14,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-02-19 19:08:14,921 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:08:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:08:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-02-19 19:08:14,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:08:14,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10088493] [2021-02-19 19:08:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:08:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:15,119 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 19:08:15,303 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-02-19 19:08:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:15,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10088493] [2021-02-19 19:08:15,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588281441] [2021-02-19 19:08:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:15,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:08:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:08:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:08:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:08:16,156 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 19:08:16,414 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-02-19 19:08:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-02-19 19:08:16,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:16,818 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2021-02-19 19:08:16,818 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.6 percent of original size [2021-02-19 19:08:16,862 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:08:16,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 19:08:16,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:17,061 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-02-19 19:08:17,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:17,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-02-19 19:08:17,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:17,305 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-02-19 19:08:17,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:17,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-02-19 19:08:17,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:17,739 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-02-19 19:08:17,739 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-02-19 19:08:17,780 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-02-19 19:08:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:08:17,782 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:17,975 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-02-19 19:08:17,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:18,019 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:08:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-02-19 19:08:18,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:18,216 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-02-19 19:08:18,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:18,260 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-02-19 19:08:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-02-19 19:08:18,271 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:18,472 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-02-19 19:08:18,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:18,520 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-02-19 19:08:18,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-02-19 19:08:18,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:18,734 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 19:08:18,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:18,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:08:18,787 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:740 [2021-02-19 19:08:19,455 WARN L202 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-02-19 19:08:19,893 WARN L202 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 19:08:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:20,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:08:20,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-02-19 19:08:20,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621960446] [2021-02-19 19:08:20,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:08:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:08:20,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:08:20,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:08:20,080 INFO L87 Difference]: Start difference. First operand 1626 states and 5501 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:20,311 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 27 [2021-02-19 19:08:20,560 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 30 [2021-02-19 19:08:21,099 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 38 [2021-02-19 19:08:21,247 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-02-19 19:08:21,469 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-02-19 19:08:21,807 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-02-19 19:08:22,362 WARN L202 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 58 [2021-02-19 19:08:22,670 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 19:08:22,914 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 19:08:23,570 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 19:08:23,982 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-02-19 19:08:25,250 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2021-02-19 19:08:25,829 WARN L202 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-02-19 19:08:26,781 WARN L202 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2021-02-19 19:08:27,711 WARN L202 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2021-02-19 19:08:28,688 WARN L202 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2021-02-19 19:08:29,807 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2021-02-19 19:08:31,077 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2021-02-19 19:08:32,285 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-19 19:08:32,998 WARN L202 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 43 [2021-02-19 19:08:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:08:33,206 INFO L93 Difference]: Finished difference Result 2896 states and 9132 transitions. [2021-02-19 19:08:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:08:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:08:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:08:33,211 INFO L225 Difference]: With dead ends: 2896 [2021-02-19 19:08:33,211 INFO L226 Difference]: Without dead ends: 2858 [2021-02-19 19:08:33,211 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:08:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-02-19 19:08:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 1630. [2021-02-19 19:08:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.3885819521178635) internal successors, (5520), 1629 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5520 transitions. [2021-02-19 19:08:33,240 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5520 transitions. Word has length 26 [2021-02-19 19:08:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:08:33,241 INFO L480 AbstractCegarLoop]: Abstraction has 1630 states and 5520 transitions. [2021-02-19 19:08:33,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5520 transitions. [2021-02-19 19:08:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:08:33,242 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:08:33,242 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:08:33,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-02-19 19:08:33,445 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:08:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:08:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-02-19 19:08:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:08:33,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585425116] [2021-02-19 19:08:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:08:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:33,654 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:08:33,779 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 19:08:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585425116] [2021-02-19 19:08:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17568764] [2021-02-19 19:08:34,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:34,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:08:34,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:08:34,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:08:34,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:08:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:08:35,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-02-19 19:08:35,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:08:35,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:08:35,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:08:35,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:08:35,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:08:35,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-02-19 19:08:35,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:08:35,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-02-19 19:08:35,262 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-02-19 19:08:35,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-02-19 19:08:35,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-02-19 19:08:35,315 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-02-19 19:08:35,332 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:08:35,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:08:35,343 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:35,391 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-02-19 19:08:35,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:08:35,393 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-02-19 19:08:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:08:35,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:08:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664623532] [2021-02-19 19:08:35,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:08:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:08:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:08:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:08:35,458 INFO L87 Difference]: Start difference. First operand 1630 states and 5520 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:35,833 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-02-19 19:08:36,164 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-02-19 19:08:36,440 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-02-19 19:08:36,621 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-02-19 19:08:36,792 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-02-19 19:08:37,377 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 19:08:37,602 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-02-19 19:08:37,800 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 19:08:37,989 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 19:08:38,483 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 19:08:38,674 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 19:08:38,902 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 19:08:39,336 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 19:08:39,558 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-02-19 19:08:40,064 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 19:08:40,380 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 19:08:40,687 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:08:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:08:40,801 INFO L93 Difference]: Finished difference Result 3331 states and 10664 transitions. [2021-02-19 19:08:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:08:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:08:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:08:40,806 INFO L225 Difference]: With dead ends: 3331 [2021-02-19 19:08:40,806 INFO L226 Difference]: Without dead ends: 3295 [2021-02-19 19:08:40,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:08:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-02-19 19:08:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 1752. [2021-02-19 19:08:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.413478012564249) internal successors, (5977), 1751 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5977 transitions. [2021-02-19 19:08:40,832 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5977 transitions. Word has length 26 [2021-02-19 19:08:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:08:40,832 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5977 transitions. [2021-02-19 19:08:40,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5977 transitions. [2021-02-19 19:08:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:08:40,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:08:40,834 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:08:41,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:41,034 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:08:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:08:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-02-19 19:08:41,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:08:41,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842571892] [2021-02-19 19:08:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:08:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:41,268 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-02-19 19:08:41,396 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 19:08:41,609 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-02-19 19:08:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842571892] [2021-02-19 19:08:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467721665] [2021-02-19 19:08:41,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:08:41,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:08:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:08:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:08:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:08:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:42,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-02-19 19:08:42,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,765 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:08:42,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,817 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-02-19 19:08:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-02-19 19:08:42,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,854 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:42,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:08:42,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,885 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:42,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-02-19 19:08:42,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,914 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:42,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-02-19 19:08:42,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,962 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-02-19 19:08:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-02-19 19:08:42,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:42,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:42,994 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:42,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:08:42,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,056 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:08:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 19:08:43,064 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,094 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:08:43,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,124 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:08:43,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,158 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-02-19 19:08:43,160 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,198 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:08:43,200 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,237 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-02-19 19:08:43,239 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:43,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-02-19 19:08:43,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:08:43,335 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:08:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-02-19 19:08:43,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:43,502 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 19:08:43,502 INFO L628 ElimStorePlain]: treesize reduction 34, result has 73.2 percent of original size [2021-02-19 19:08:43,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:08:43,519 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-02-19 19:08:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:43,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:08:43,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:08:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507313766] [2021-02-19 19:08:43,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:08:43,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:08:43,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:08:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:08:43,705 INFO L87 Difference]: Start difference. First operand 1752 states and 5977 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:44,323 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:08:44,472 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-19 19:08:45,118 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 19:08:45,902 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-02-19 19:08:46,184 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 19:08:46,552 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 19:08:47,025 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-02-19 19:08:47,369 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 19:08:47,576 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-02-19 19:08:47,937 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 19:08:48,147 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 19:08:48,471 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-02-19 19:08:49,023 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-02-19 19:08:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:08:49,527 INFO L93 Difference]: Finished difference Result 3719 states and 11782 transitions. [2021-02-19 19:08:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:08:49,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:08:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:08:49,534 INFO L225 Difference]: With dead ends: 3719 [2021-02-19 19:08:49,534 INFO L226 Difference]: Without dead ends: 3662 [2021-02-19 19:08:49,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:08:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2021-02-19 19:08:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 1787. [2021-02-19 19:08:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 3.4210526315789473) internal successors, (6110), 1786 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 6110 transitions. [2021-02-19 19:08:49,563 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 6110 transitions. Word has length 26 [2021-02-19 19:08:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:08:49,563 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 6110 transitions. [2021-02-19 19:08:49,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 6110 transitions. [2021-02-19 19:08:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:08:49,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:08:49,565 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:08:49,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1881,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:49,766 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:08:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:08:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 27 times [2021-02-19 19:08:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:08:49,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750938702] [2021-02-19 19:08:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:08:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:08:50,000 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:08:50,152 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 19:08:50,281 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 19:08:50,417 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 19:08:50,546 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 19:08:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:50,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750938702] [2021-02-19 19:08:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073133991] [2021-02-19 19:08:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:08:50,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:08:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:08:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:08:50,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:08:50,984 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:08:51,457 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 19:08:51,867 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-19 19:08:52,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:52,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:08:52,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:52,342 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-02-19 19:08:52,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:52,379 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:08:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:08:52,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:52,629 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-02-19 19:08:52,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:52,669 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:08:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 19:08:52,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:52,913 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-02-19 19:08:52,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:52,977 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:08:52,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-02-19 19:08:52,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:53,218 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-02-19 19:08:53,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:53,256 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-02-19 19:08:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-02-19 19:08:53,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:53,494 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 19:08:53,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:53,527 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-02-19 19:08:53,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-02-19 19:08:53,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:53,765 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 19:08:53,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:53,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:53,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-02-19 19:08:53,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:54,031 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 19:08:54,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:54,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:54,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-02-19 19:08:54,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:08:54,297 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 19:08:54,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:08:54,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:08:54,312 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-02-19 19:08:54,742 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 19:08:54,919 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-02-19 19:08:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:08:54,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:08:54,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-02-19 19:08:54,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730769163] [2021-02-19 19:08:54,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:08:54,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:08:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:08:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:08:54,955 INFO L87 Difference]: Start difference. First operand 1787 states and 6110 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:08:55,274 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2021-02-19 19:08:55,837 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2021-02-19 19:08:56,326 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-02-19 19:08:56,591 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-02-19 19:08:57,102 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 19:08:57,546 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 19:08:58,067 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:08:58,524 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 19:08:58,968 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-02-19 19:08:59,882 WARN L202 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-02-19 19:09:00,640 WARN L202 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-02-19 19:09:01,543 WARN L202 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-02-19 19:09:02,880 WARN L202 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2021-02-19 19:09:03,889 WARN L202 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2021-02-19 19:09:04,677 WARN L202 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 68 [2021-02-19 19:09:05,204 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 19:09:05,639 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 19:09:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:09:06,101 INFO L93 Difference]: Finished difference Result 2408 states and 7948 transitions. [2021-02-19 19:09:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:09:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:09:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:09:06,106 INFO L225 Difference]: With dead ends: 2408 [2021-02-19 19:09:06,107 INFO L226 Difference]: Without dead ends: 2378 [2021-02-19 19:09:06,107 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:09:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-02-19 19:09:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1790. [2021-02-19 19:09:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.418110676355506) internal successors, (6115), 1789 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6115 transitions. [2021-02-19 19:09:06,130 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6115 transitions. Word has length 26 [2021-02-19 19:09:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:09:06,130 INFO L480 AbstractCegarLoop]: Abstraction has 1790 states and 6115 transitions. [2021-02-19 19:09:06,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6115 transitions. [2021-02-19 19:09:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:09:06,132 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:09:06,132 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:09:06,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-02-19 19:09:06,333 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:09:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:09:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 28 times [2021-02-19 19:09:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:09:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131947431] [2021-02-19 19:09:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:09:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:06,567 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 19:09:06,732 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-02-19 19:09:06,885 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 19:09:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:07,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131947431] [2021-02-19 19:09:07,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533060995] [2021-02-19 19:09:07,146 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:07,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:09:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:09:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:09:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:09:07,536 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:09:07,859 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-02-19 19:09:08,044 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_270, v_prenex_271, v_prenex_272], 6=[A]} [2021-02-19 19:09:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:09:08,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:09:08,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,360 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 19:09:08,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,385 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:09:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:09:08,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:09:08,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,648 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 19:09:08,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:09:08,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:09:08,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:09:08,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,933 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 19:09:08,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:08,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 19:09:08,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:08,987 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-02-19 19:09:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-02-19 19:09:08,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:09,192 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 19:09:09,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:09,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:09:09,200 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:335, output treesize:189 [2021-02-19 19:09:09,541 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 19:09:09,700 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-02-19 19:09:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:09,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:09:09,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-02-19 19:09:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130473642] [2021-02-19 19:09:09,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:09:09,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:09:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:09:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:09:09,744 INFO L87 Difference]: Start difference. First operand 1790 states and 6115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:09,931 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 26 [2021-02-19 19:09:10,180 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-02-19 19:09:10,409 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-02-19 19:09:10,728 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-02-19 19:09:11,006 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 19:09:11,254 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 19:09:11,529 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 19:09:11,794 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 19:09:12,018 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 19:09:12,341 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 19:09:12,690 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 19:09:12,957 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-02-19 19:09:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:09:13,057 INFO L93 Difference]: Finished difference Result 2370 states and 7911 transitions. [2021-02-19 19:09:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:09:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:09:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:09:13,062 INFO L225 Difference]: With dead ends: 2370 [2021-02-19 19:09:13,062 INFO L226 Difference]: Without dead ends: 2345 [2021-02-19 19:09:13,062 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:09:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-02-19 19:09:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1793. [2021-02-19 19:09:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.4174107142857144) internal successors, (6124), 1792 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6124 transitions. [2021-02-19 19:09:13,082 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6124 transitions. Word has length 26 [2021-02-19 19:09:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:09:13,083 INFO L480 AbstractCegarLoop]: Abstraction has 1793 states and 6124 transitions. [2021-02-19 19:09:13,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6124 transitions. [2021-02-19 19:09:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:09:13,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:09:13,085 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:09:13,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-02-19 19:09:13,285 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:09:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:09:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash 654380625, now seen corresponding path program 29 times [2021-02-19 19:09:13,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:09:13,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966813625] [2021-02-19 19:09:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:09:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:13,520 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 19:09:13,666 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 19:09:13,803 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 19:09:13,924 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:09:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:14,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966813625] [2021-02-19 19:09:14,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323698039] [2021-02-19 19:09:14,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:14,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:09:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:09:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:09:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:09:14,390 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:09:14,576 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:09:14,973 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 19:09:15,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:15,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-02-19 19:09:15,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:15,291 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 19:09:15,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:15,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-02-19 19:09:15,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:15,529 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-02-19 19:09:15,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:15,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:09:15,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:15,757 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-02-19 19:09:15,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:15,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:09:15,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:15,989 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-02-19 19:09:15,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:16,012 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:09:16,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:09:16,016 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:16,228 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 19:09:16,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:16,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:09:16,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 19:09:16,253 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:16,448 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 19:09:16,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:16,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:16,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:16,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-02-19 19:09:16,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:16,663 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 19:09:16,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:16,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:09:16,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 19:09:16,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:16,875 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:09:16,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:16,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:09:16,884 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-02-19 19:09:17,073 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 19:09:17,249 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-02-19 19:09:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:09:17,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:09:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125710981] [2021-02-19 19:09:17,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:09:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:09:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:09:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:09:17,289 INFO L87 Difference]: Start difference. First operand 1793 states and 6124 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:17,567 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 26 [2021-02-19 19:09:17,818 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-02-19 19:09:18,088 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-02-19 19:09:18,464 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-02-19 19:09:18,958 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:09:19,237 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 19:09:19,536 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 19:09:19,994 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-02-19 19:09:20,376 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 19:09:21,067 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:09:21,943 WARN L202 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 19:09:22,170 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:09:22,781 WARN L202 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 19:09:23,033 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-02-19 19:09:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:09:23,248 INFO L93 Difference]: Finished difference Result 2554 states and 8490 transitions. [2021-02-19 19:09:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:09:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:09:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:09:23,253 INFO L225 Difference]: With dead ends: 2554 [2021-02-19 19:09:23,253 INFO L226 Difference]: Without dead ends: 2535 [2021-02-19 19:09:23,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:09:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-02-19 19:09:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1791. [2021-02-19 19:09:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.416201117318436) internal successors, (6115), 1790 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6115 transitions. [2021-02-19 19:09:23,275 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6115 transitions. Word has length 26 [2021-02-19 19:09:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:09:23,275 INFO L480 AbstractCegarLoop]: Abstraction has 1791 states and 6115 transitions. [2021-02-19 19:09:23,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6115 transitions. [2021-02-19 19:09:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:09:23,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:09:23,277 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:09:23,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:23,478 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:09:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:09:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-02-19 19:09:23,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:09:23,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633021631] [2021-02-19 19:09:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:09:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:23,717 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:09:23,854 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 19:09:23,983 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-02-19 19:09:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:24,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633021631] [2021-02-19 19:09:24,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368076826] [2021-02-19 19:09:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:24,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:09:24,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:09:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:09:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:09:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:09:25,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-02-19 19:09:25,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 19:09:25,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:09:25,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:09:25,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:09:25,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:09:25,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:09:25,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:09:25,603 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:09:25,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-02-19 19:09:25,647 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-02-19 19:09:25,666 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:09:25,685 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:09:25,702 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-02-19 19:09:25,718 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:25,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-02-19 19:09:25,728 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:25,797 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-02-19 19:09:25,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:09:25,799 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-02-19 19:09:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:25,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:09:25,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:09:25,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072237760] [2021-02-19 19:09:25,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:09:25,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:09:25,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:09:25,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:09:25,864 INFO L87 Difference]: Start difference. First operand 1791 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:26,564 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-02-19 19:09:26,726 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-02-19 19:09:26,931 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-02-19 19:09:27,139 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 19:09:27,329 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-02-19 19:09:27,607 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-02-19 19:09:27,801 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-02-19 19:09:27,970 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-02-19 19:09:28,121 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 19:09:28,299 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:09:28,659 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-02-19 19:09:28,835 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-02-19 19:09:29,569 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 19:09:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:09:29,746 INFO L93 Difference]: Finished difference Result 2292 states and 7575 transitions. [2021-02-19 19:09:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:09:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:09:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:09:29,751 INFO L225 Difference]: With dead ends: 2292 [2021-02-19 19:09:29,751 INFO L226 Difference]: Without dead ends: 2270 [2021-02-19 19:09:29,751 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:09:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-02-19 19:09:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1783. [2021-02-19 19:09:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4158249158249157) internal successors, (6087), 1782 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6087 transitions. [2021-02-19 19:09:29,771 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6087 transitions. Word has length 26 [2021-02-19 19:09:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:09:29,771 INFO L480 AbstractCegarLoop]: Abstraction has 1783 states and 6087 transitions. [2021-02-19 19:09:29,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6087 transitions. [2021-02-19 19:09:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:09:29,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:09:29,773 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:09:29,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2072 [2021-02-19 19:09:29,973 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:09:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:09:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-02-19 19:09:29,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:09:29,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843939201] [2021-02-19 19:09:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:09:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:30,237 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 19:09:30,361 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 19:09:30,480 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-02-19 19:09:30,707 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:09:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:30,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843939201] [2021-02-19 19:09:30,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614330630] [2021-02-19 19:09:30,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:09:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:09:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:09:31,475 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 19:09:31,574 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_291, v_prenex_287], 6=[A, v_prenex_289]} [2021-02-19 19:09:31,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:31,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 19:09:31,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:31,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-02-19 19:09:31,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:31,833 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-02-19 19:09:31,833 INFO L628 ElimStorePlain]: treesize reduction 164, result has 44.0 percent of original size [2021-02-19 19:09:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 19:09:31,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:31,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:31,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 19:09:31,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:32,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:32,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:32,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:09:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 19:09:32,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:32,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:32,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:09:32,087 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:357, output treesize:42 [2021-02-19 19:09:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:32,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:09:32,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 19:09:32,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896797510] [2021-02-19 19:09:32,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:09:32,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:09:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:09:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:09:32,198 INFO L87 Difference]: Start difference. First operand 1783 states and 6087 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:32,921 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-02-19 19:09:33,122 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-02-19 19:09:33,364 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-02-19 19:09:33,552 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2021-02-19 19:09:33,817 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-02-19 19:09:34,044 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2021-02-19 19:09:34,311 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2021-02-19 19:09:34,463 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 19:09:34,628 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-02-19 19:09:34,797 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 19:09:35,088 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-02-19 19:09:35,441 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-02-19 19:09:35,821 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-02-19 19:09:36,031 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 36 [2021-02-19 19:09:36,348 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:09:36,719 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 19:09:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:09:37,053 INFO L93 Difference]: Finished difference Result 2095 states and 6896 transitions. [2021-02-19 19:09:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:09:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:09:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:09:37,058 INFO L225 Difference]: With dead ends: 2095 [2021-02-19 19:09:37,058 INFO L226 Difference]: Without dead ends: 2080 [2021-02-19 19:09:37,059 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:09:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-02-19 19:09:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1783. [2021-02-19 19:09:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4158249158249157) internal successors, (6087), 1782 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6087 transitions. [2021-02-19 19:09:37,078 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6087 transitions. Word has length 26 [2021-02-19 19:09:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:09:37,078 INFO L480 AbstractCegarLoop]: Abstraction has 1783 states and 6087 transitions. [2021-02-19 19:09:37,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6087 transitions. [2021-02-19 19:09:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:09:37,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:09:37,080 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:09:37,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:37,282 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:09:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:09:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-02-19 19:09:37,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:09:37,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835296086] [2021-02-19 19:09:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:09:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:09:37,491 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 19:09:37,619 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:09:37,845 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 19:09:37,967 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 19:09:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835296086] [2021-02-19 19:09:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243226244] [2021-02-19 19:09:38,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:09:38,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:09:38,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:09:38,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:09:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:09:39,012 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 19:09:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:40,153 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-02-19 19:09:40,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-02-19 19:09:40,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:40,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:40,220 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-02-19 19:09:40,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-02-19 19:09:40,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:42,174 WARN L202 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 159 DAG size of output: 151 [2021-02-19 19:09:42,175 INFO L628 ElimStorePlain]: treesize reduction 14, result has 98.4 percent of original size [2021-02-19 19:09:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:42,322 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:09:42,323 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-02-19 19:09:42,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-02-19 19:09:42,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:42,432 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-02-19 19:09:42,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-02-19 19:09:42,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:44,441 WARN L202 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 157 DAG size of output: 150 [2021-02-19 19:09:44,442 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.3 percent of original size [2021-02-19 19:09:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:44,567 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-02-19 19:09:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-02-19 19:09:44,597 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:44,712 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-02-19 19:09:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-02-19 19:09:44,724 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:46,694 WARN L202 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-02-19 19:09:46,695 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.4 percent of original size [2021-02-19 19:09:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:46,808 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-02-19 19:09:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-02-19 19:09:46,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:46,942 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-02-19 19:09:46,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-02-19 19:09:46,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:47,974 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 142 [2021-02-19 19:09:47,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:48,119 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-02-19 19:09:48,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-02-19 19:09:48,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:48,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:48,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-02-19 19:09:48,240 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:51,365 WARN L202 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 153 DAG size of output: 143 [2021-02-19 19:09:51,366 INFO L628 ElimStorePlain]: treesize reduction 87, result has 90.6 percent of original size [2021-02-19 19:09:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:51,500 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-02-19 19:09:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 48 [2021-02-19 19:09:51,521 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:51,635 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-02-19 19:09:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-02-19 19:09:51,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:52,626 WARN L202 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-02-19 19:09:52,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:52,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-02-19 19:09:52,762 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:52,865 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-02-19 19:09:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-02-19 19:09:52,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:53,896 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 126 [2021-02-19 19:09:53,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:54,071 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:09:54,071 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-02-19 19:09:54,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-02-19 19:09:54,088 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:09:54,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:09:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-02-19 19:09:54,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:09:56,982 WARN L202 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 132 DAG size of output: 122 [2021-02-19 19:09:56,983 INFO L628 ElimStorePlain]: treesize reduction 73, result has 91.4 percent of original size [2021-02-19 19:09:57,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-02-19 19:09:57,110 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:945, output treesize:2286 [2021-02-19 19:09:58,589 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 159 DAG size of output: 53 [2021-02-19 19:09:58,961 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 19:09:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:09:59,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:09:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-02-19 19:09:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275899493] [2021-02-19 19:09:59,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:09:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:09:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:09:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:09:59,037 INFO L87 Difference]: Start difference. First operand 1783 states and 6087 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:09:59,239 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-02-19 19:09:59,689 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-02-19 19:09:59,868 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-02-19 19:10:00,117 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 19:10:00,375 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-02-19 19:10:00,571 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-02-19 19:10:00,937 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-02-19 19:10:01,422 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-02-19 19:10:01,680 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-02-19 19:10:02,022 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 19:10:02,329 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2021-02-19 19:10:03,161 WARN L202 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 19:10:03,384 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-02-19 19:10:03,651 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-02-19 19:10:04,502 WARN L202 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-02-19 19:10:05,442 WARN L202 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-02-19 19:10:06,405 WARN L202 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-02-19 19:10:06,652 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 19:10:06,923 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 19:10:07,321 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 19:10:07,620 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 19:10:08,426 WARN L202 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-02-19 19:10:09,422 WARN L202 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-02-19 19:10:09,779 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-02-19 19:10:10,165 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-02-19 19:10:10,474 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 19:10:10,722 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 19:10:11,845 WARN L202 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 19:10:13,635 WARN L202 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-02-19 19:10:14,478 WARN L202 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 19:10:16,487 WARN L202 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-02-19 19:10:17,941 WARN L202 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-02-19 19:10:19,097 WARN L202 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-02-19 19:10:19,449 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 19:10:20,020 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-02-19 19:10:20,343 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2021-02-19 19:10:20,901 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-02-19 19:10:21,370 WARN L202 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2021-02-19 19:10:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:10:21,591 INFO L93 Difference]: Finished difference Result 2852 states and 9108 transitions. [2021-02-19 19:10:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:10:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:10:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:10:21,597 INFO L225 Difference]: With dead ends: 2852 [2021-02-19 19:10:21,597 INFO L226 Difference]: Without dead ends: 2811 [2021-02-19 19:10:21,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:10:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-02-19 19:10:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1796. [2021-02-19 19:10:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.4139275766016715) internal successors, (6128), 1795 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:10:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6128 transitions. [2021-02-19 19:10:21,623 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6128 transitions. Word has length 26 [2021-02-19 19:10:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:10:21,623 INFO L480 AbstractCegarLoop]: Abstraction has 1796 states and 6128 transitions. [2021-02-19 19:10:21,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:10:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6128 transitions. [2021-02-19 19:10:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:10:21,625 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:10:21,626 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:10:21,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2200,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:10:21,836 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:10:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:10:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1872987119, now seen corresponding path program 51 times [2021-02-19 19:10:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:10:21,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151153458] [2021-02-19 19:10:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:10:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:10:22,117 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:10:22,282 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 19:10:22,414 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 19:10:22,569 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 19:10:22,775 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-02-19 19:10:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:10:23,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151153458] [2021-02-19 19:10:23,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680760073] [2021-02-19 19:10:23,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:10:23,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:10:23,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:10:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:10:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:10:23,797 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:10:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:24,589 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-02-19 19:10:24,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-02-19 19:10:24,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:24,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-02-19 19:10:24,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:24,912 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 19:10:24,913 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-02-19 19:10:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-02-19 19:10:24,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,072 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-02-19 19:10:25,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-02-19 19:10:25,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:25,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-02-19 19:10:25,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,297 INFO L354 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2021-02-19 19:10:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 32 [2021-02-19 19:10:25,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,359 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-02-19 19:10:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:10:25,362 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,498 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-02-19 19:10:25,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-02-19 19:10:25,519 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,585 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-02-19 19:10:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-02-19 19:10:25,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,709 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-02-19 19:10:25,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-02-19 19:10:25,726 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,815 INFO L354 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2021-02-19 19:10:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 32 [2021-02-19 19:10:25,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:25,925 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-02-19 19:10:25,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-02-19 19:10:25,928 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:26,065 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-02-19 19:10:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-02-19 19:10:26,100 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:26,156 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-02-19 19:10:26,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:10:26,158 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:26,210 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-02-19 19:10:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:10:26,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:26,247 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-02-19 19:10:26,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:10:26,249 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:27,127 WARN L202 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-02-19 19:10:27,128 INFO L628 ElimStorePlain]: treesize reduction 264, result has 58.1 percent of original size [2021-02-19 19:10:27,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 19:10:27,146 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:435 [2021-02-19 19:10:28,098 WARN L202 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 19:10:28,780 WARN L202 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 19:10:28,995 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 19:10:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:10:29,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:10:29,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-02-19 19:10:29,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274061972] [2021-02-19 19:10:29,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:10:29,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:10:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:10:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:10:29,067 INFO L87 Difference]: Start difference. First operand 1796 states and 6128 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:10:29,512 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-02-19 19:10:29,801 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 19:10:30,067 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 19:10:30,331 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 19:10:30,548 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 19:10:30,801 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-02-19 19:10:31,177 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-02-19 19:10:31,584 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-02-19 19:10:31,865 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2021-02-19 19:10:32,188 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-02-19 19:10:32,366 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:10:32,744 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 19:10:33,780 WARN L202 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-02-19 19:10:34,426 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 19:10:34,913 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-02-19 19:10:35,317 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-02-19 19:10:35,672 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 19:10:36,089 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-02-19 19:10:37,021 WARN L202 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-02-19 19:10:37,995 WARN L202 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 19:10:38,811 WARN L202 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 19:10:39,808 WARN L202 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-02-19 19:10:40,375 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-02-19 19:10:41,038 WARN L202 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 48 [2021-02-19 19:10:41,322 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 19:10:42,325 WARN L202 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-02-19 19:10:42,984 WARN L202 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 41 [2021-02-19 19:10:43,513 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 19:10:43,953 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-02-19 19:10:44,229 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-02-19 19:10:45,455 WARN L202 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-02-19 19:10:45,820 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 19:10:46,967 WARN L202 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-02-19 19:10:47,634 WARN L202 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-02-19 19:10:48,542 WARN L202 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-02-19 19:10:49,480 WARN L202 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-02-19 19:10:50,503 WARN L202 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-02-19 19:10:50,845 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2021-02-19 19:10:51,291 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 35 [2021-02-19 19:10:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:10:51,689 INFO L93 Difference]: Finished difference Result 2975 states and 9479 transitions. [2021-02-19 19:10:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:10:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:10:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:10:51,695 INFO L225 Difference]: With dead ends: 2975 [2021-02-19 19:10:51,695 INFO L226 Difference]: Without dead ends: 2919 [2021-02-19 19:10:51,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=797, Invalid=3759, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:10:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-02-19 19:10:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 1819. [2021-02-19 19:10:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.403190319031903) internal successors, (6187), 1818 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:10:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6187 transitions. [2021-02-19 19:10:51,720 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6187 transitions. Word has length 26 [2021-02-19 19:10:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:10:51,720 INFO L480 AbstractCegarLoop]: Abstraction has 1819 states and 6187 transitions. [2021-02-19 19:10:51,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:10:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6187 transitions. [2021-02-19 19:10:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:10:51,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:10:51,722 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:10:51,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:10:51,923 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:10:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:10:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 52 times [2021-02-19 19:10:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:10:51,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343478976] [2021-02-19 19:10:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:10:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:10:52,193 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 19:10:52,328 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 19:10:52,590 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 19:10:52,803 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 19:10:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:10:53,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343478976] [2021-02-19 19:10:53,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271723167] [2021-02-19 19:10:53,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:10:53,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:10:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:10:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:10:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:10:53,989 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:10:54,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:54,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:54,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-02-19 19:10:54,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:54,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:54,656 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:10:54,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-02-19 19:10:54,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:55,561 WARN L202 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-02-19 19:10:55,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:55,659 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:10:55,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 19:10:55,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:55,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:55,709 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:10:55,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:10:55,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:56,497 WARN L202 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-02-19 19:10:56,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:56,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:56,592 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-02-19 19:10:56,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-02-19 19:10:56,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:56,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:56,703 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-02-19 19:10:56,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-02-19 19:10:56,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:57,508 WARN L202 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-02-19 19:10:57,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:57,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:57,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-02-19 19:10:57,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:57,681 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-02-19 19:10:57,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-02-19 19:10:57,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:58,451 WARN L202 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 19:10:58,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:58,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:10:58,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-02-19 19:10:58,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:10:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:10:58,623 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:10:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-02-19 19:10:58,635 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:00,058 WARN L202 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 129 DAG size of output: 118 [2021-02-19 19:11:00,059 INFO L628 ElimStorePlain]: treesize reduction 43, result has 92.4 percent of original size [2021-02-19 19:11:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,152 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:11:00,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-02-19 19:11:00,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,198 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:11:00,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:11:00,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:00,800 WARN L202 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-19 19:11:00,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:11:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,891 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-02-19 19:11:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-02-19 19:11:00,897 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:00,971 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:11:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-02-19 19:11:00,978 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:01,564 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 19:11:01,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:11:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:01,651 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:11:01,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-02-19 19:11:01,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:11:01,715 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-02-19 19:11:01,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-02-19 19:11:01,720 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:11:02,272 WARN L202 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 19:11:02,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:11:02,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-02-19 19:11:02,306 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-02-19 19:11:02,679 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-02-19 19:11:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:11:02,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:11:02,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-02-19 19:11:02,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617454469] [2021-02-19 19:11:02,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:11:02,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:11:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:11:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:11:02,823 INFO L87 Difference]: Start difference. First operand 1819 states and 6187 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:11:03,165 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-02-19 19:11:03,339 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 19:11:03,811 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-02-19 19:11:04,151 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-02-19 19:11:04,316 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 19:11:04,509 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 19:11:04,843 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-02-19 19:11:05,125 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2021-02-19 19:11:05,418 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-02-19 19:11:05,744 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-02-19 19:11:06,347 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-02-19 19:11:06,891 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 19:11:08,430 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-02-19 19:11:08,692 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 19:11:08,924 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 19:11:55,470 WARN L202 SmtUtils]: Spent 46.26 s on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2021-02-19 19:11:55,868 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:11:56,256 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-02-19 19:11:57,793 WARN L202 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-02-19 19:11:58,169 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-02-19 19:11:58,467 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 19:11:59,233 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-02-19 19:11:59,929 WARN L202 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 19:12:01,644 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-02-19 19:12:02,223 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 19:12:02,730 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-02-19 19:12:03,100 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 19:12:04,072 WARN L202 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 19:12:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:12:04,601 INFO L93 Difference]: Finished difference Result 3009 states and 9802 transitions. [2021-02-19 19:12:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:12:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:12:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:12:04,612 INFO L225 Difference]: With dead ends: 3009 [2021-02-19 19:12:04,612 INFO L226 Difference]: Without dead ends: 2958 [2021-02-19 19:12:04,612 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=603, Invalid=2703, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:12:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-02-19 19:12:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 1860. [2021-02-19 19:12:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.413663259817106) internal successors, (6346), 1859 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6346 transitions. [2021-02-19 19:12:04,653 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6346 transitions. Word has length 26 [2021-02-19 19:12:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:12:04,653 INFO L480 AbstractCegarLoop]: Abstraction has 1860 states and 6346 transitions. [2021-02-19 19:12:04,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6346 transitions. [2021-02-19 19:12:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:12:04,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:12:04,656 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:12:04,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2545,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:12:04,856 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:12:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:12:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash -455815001, now seen corresponding path program 53 times [2021-02-19 19:12:04,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:12:04,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480514356] [2021-02-19 19:12:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:12:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:12:05,497 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 19:12:05,909 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-02-19 19:12:06,386 WARN L202 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-02-19 19:12:06,766 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 19:12:06,926 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 19:12:07,101 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-02-19 19:12:07,279 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-02-19 19:12:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:12:07,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480514356] [2021-02-19 19:12:07,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855013711] [2021-02-19 19:12:07,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:12:07,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:12:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:12:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:12:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:12:07,819 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 19:12:08,084 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:12:08,379 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:12:08,798 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 19:12:10,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-02-19 19:12:10,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-02-19 19:12:10,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-02-19 19:12:10,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 19:12:10,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:12:10,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-02-19 19:12:10,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-02-19 19:12:10,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-02-19 19:12:10,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 19:12:10,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:12:10,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-02-19 19:12:10,670 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-02-19 19:12:10,718 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-02-19 19:12:10,775 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:12:10,826 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-02-19 19:12:10,874 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:10,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:10,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:12:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-02-19 19:12:10,902 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:11,101 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-02-19 19:12:11,102 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-02-19 19:12:11,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:12:11,106 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-02-19 19:12:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:12:11,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:12:11,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:12:11,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334388389] [2021-02-19 19:12:11,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:12:11,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:12:11,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:12:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:12:11,315 INFO L87 Difference]: Start difference. First operand 1860 states and 6346 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:11,807 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 19:12:12,118 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-19 19:12:12,604 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-02-19 19:12:13,062 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-02-19 19:12:13,584 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:12:13,939 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-02-19 19:12:14,613 WARN L202 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-02-19 19:12:15,398 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-02-19 19:12:16,332 WARN L202 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 19:12:16,846 WARN L202 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-19 19:12:17,377 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-02-19 19:12:17,948 WARN L202 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 19:12:18,683 WARN L202 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 19:12:19,228 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:12:19,987 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-02-19 19:12:20,902 WARN L202 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-02-19 19:12:21,493 WARN L202 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-02-19 19:12:22,362 WARN L202 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 19:12:23,032 WARN L202 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 19:12:24,055 WARN L202 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 19:12:24,917 WARN L202 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-02-19 19:12:26,159 WARN L202 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-02-19 19:12:27,383 WARN L202 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-02-19 19:12:29,394 WARN L202 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-02-19 19:12:30,562 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-02-19 19:12:32,597 WARN L202 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 19:12:33,809 WARN L202 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-02-19 19:12:36,011 WARN L202 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-02-19 19:12:37,484 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2021-02-19 19:12:38,903 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-02-19 19:12:39,973 WARN L202 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-02-19 19:12:41,689 WARN L202 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 19:12:43,593 WARN L202 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-02-19 19:12:45,091 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-02-19 19:12:47,715 WARN L202 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-02-19 19:12:48,276 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 19:12:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:12:48,579 INFO L93 Difference]: Finished difference Result 2741 states and 8850 transitions. [2021-02-19 19:12:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:12:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:12:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:12:48,588 INFO L225 Difference]: With dead ends: 2741 [2021-02-19 19:12:48,588 INFO L226 Difference]: Without dead ends: 2711 [2021-02-19 19:12:48,588 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=564, Invalid=2858, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:12:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-02-19 19:12:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1879. [2021-02-19 19:12:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4179978700745473) internal successors, (6419), 1878 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6419 transitions. [2021-02-19 19:12:48,613 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6419 transitions. Word has length 26 [2021-02-19 19:12:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:12:48,613 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6419 transitions. [2021-02-19 19:12:48,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6419 transitions. [2021-02-19 19:12:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:12:48,616 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:12:48,616 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:12:48,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2614 [2021-02-19 19:12:48,816 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:12:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:12:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1502755185, now seen corresponding path program 54 times [2021-02-19 19:12:48,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:12:48,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043223709] [2021-02-19 19:12:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:12:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:12:49,051 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 19:12:49,364 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 19:12:49,511 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-02-19 19:12:49,747 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:12:50,041 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 19:12:50,225 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 19:12:50,415 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-19 19:12:50,576 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-02-19 19:12:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:12:50,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043223709] [2021-02-19 19:12:50,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844326427] [2021-02-19 19:12:50,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:12:50,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:12:50,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:12:50,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:12:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:12:51,299 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 19:12:51,606 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 19:12:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:51,930 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-02-19 19:12:51,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 19:12:51,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,071 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-02-19 19:12:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 27 [2021-02-19 19:12:52,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,232 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-02-19 19:12:52,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-02-19 19:12:52,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,326 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-02-19 19:12:52,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,480 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-02-19 19:12:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-02-19 19:12:52,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,666 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-02-19 19:12:52,667 INFO L354 Elim1Store]: treesize reduction 11, result has 59.3 percent of original size [2021-02-19 19:12:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-02-19 19:12:52,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:12:52,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-02-19 19:12:52,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:52,996 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-02-19 19:12:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-02-19 19:12:53,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,151 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-02-19 19:12:53,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-02-19 19:12:53,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,289 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-02-19 19:12:53,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-02-19 19:12:53,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,382 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:12:53,387 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,475 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:53,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-02-19 19:12:53,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,571 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:53,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-02-19 19:12:53,575 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,657 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-02-19 19:12:53,662 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,790 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-02-19 19:12:53,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 23 [2021-02-19 19:12:53,796 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:12:53,840 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:12:53,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-02-19 19:12:53,844 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 19:12:54,341 WARN L202 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-02-19 19:12:54,342 INFO L628 ElimStorePlain]: treesize reduction 128, result has 42.1 percent of original size [2021-02-19 19:12:54,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:12:54,346 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-02-19 19:12:54,649 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-02-19 19:12:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:12:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:12:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-02-19 19:12:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940044044] [2021-02-19 19:12:54,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:12:54,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:12:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:12:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:12:54,851 INFO L87 Difference]: Start difference. First operand 1879 states and 6419 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:12:55,143 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-02-19 19:12:55,328 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-02-19 19:12:55,627 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-02-19 19:12:56,138 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 19:12:56,789 WARN L202 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 19:12:57,183 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 19:12:57,384 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:12:57,895 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-02-19 19:12:58,641 WARN L202 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-02-19 19:12:59,467 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 19:13:00,468 WARN L202 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-02-19 19:13:01,481 WARN L202 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 19:13:01,973 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 19:13:02,518 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:13:04,029 WARN L202 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-02-19 19:13:04,753 WARN L202 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 19:13:05,166 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-02-19 19:13:05,712 WARN L202 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 19:13:06,286 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-02-19 19:13:07,188 WARN L202 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-02-19 19:13:07,840 WARN L202 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 19:13:08,798 WARN L202 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-02-19 19:13:09,795 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-02-19 19:13:10,619 WARN L202 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-02-19 19:13:11,136 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 19:13:12,047 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-02-19 19:13:12,918 WARN L202 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-02-19 19:13:13,491 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-19 19:13:14,358 WARN L202 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 19:13:14,727 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:13:15,792 WARN L202 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 19:13:16,679 WARN L202 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-02-19 19:13:17,287 WARN L202 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 19:13:17,469 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-02-19 19:13:18,507 WARN L202 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 19:13:19,517 WARN L202 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-02-19 19:13:20,759 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 19:13:21,893 WARN L202 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-02-19 19:13:22,757 WARN L202 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 19:13:24,147 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-02-19 19:13:24,919 WARN L202 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 19:13:25,512 WARN L202 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 19:13:27,406 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-02-19 19:13:28,276 WARN L202 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 19:13:29,362 WARN L202 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 19:13:29,736 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-02-19 19:13:31,413 WARN L202 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-02-19 19:13:32,925 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 19:13:34,408 WARN L202 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 19:13:34,931 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-02-19 19:13:35,505 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-02-19 19:13:36,494 WARN L202 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-02-19 19:13:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:13:36,774 INFO L93 Difference]: Finished difference Result 3255 states and 10464 transitions. [2021-02-19 19:13:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:13:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:13:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:13:36,784 INFO L225 Difference]: With dead ends: 3255 [2021-02-19 19:13:36,785 INFO L226 Difference]: Without dead ends: 3215 [2021-02-19 19:13:36,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=972, Invalid=4728, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:13:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-02-19 19:13:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 1904. [2021-02-19 19:13:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 3.413557540725171) internal successors, (6496), 1903 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:13:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 6496 transitions. [2021-02-19 19:13:36,834 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 6496 transitions. Word has length 26 [2021-02-19 19:13:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:13:36,834 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 6496 transitions. [2021-02-19 19:13:36,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:13:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 6496 transitions. [2021-02-19 19:13:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:13:36,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:13:36,837 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:13:37,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2710 [2021-02-19 19:13:37,037 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:13:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:13:37,037 INFO L82 PathProgramCache]: Analyzing trace with hash -505799277, now seen corresponding path program 30 times [2021-02-19 19:13:37,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:13:37,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229385439] [2021-02-19 19:13:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:13:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:13:37,716 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 19:13:38,130 WARN L202 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 19:13:38,511 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-19 19:13:38,843 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 19:13:38,998 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-02-19 19:13:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:13:39,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229385439] [2021-02-19 19:13:39,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485168365] [2021-02-19 19:13:39,005 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 19:13:39,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:13:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:13:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:13:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:13:39,956 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 19:13:40,981 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:13:41,419 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 52 Received shutdown request... [2021-02-19 19:13:41,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2736 [2021-02-19 19:13:41,909 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:13:41,912 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:13:41,912 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:13:41 BasicIcfg [2021-02-19 19:13:41,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:13:41,912 INFO L168 Benchmark]: Toolchain (without parser) took 543633.54 ms. Allocated memory was 255.9 MB in the beginning and 528.5 MB in the end (delta: 272.6 MB). Free memory was 236.3 MB in the beginning and 485.5 MB in the end (delta: -249.2 MB). Peak memory consumption was 322.5 MB. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L168 Benchmark]: Boogie Preprocessor took 13.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L168 Benchmark]: RCFGBuilder took 233.39 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 236.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L168 Benchmark]: TraceAbstraction took 543359.34 ms. Allocated memory was 255.9 MB in the beginning and 528.5 MB in the end (delta: 272.6 MB). Free memory was 236.3 MB in the beginning and 485.5 MB in the end (delta: -249.2 MB). Peak memory consumption was 321.0 MB. Max. memory is 16.0 GB. [2021-02-19 19:13:41,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 233.39 ms. Allocated memory is still 255.9 MB. Free memory was 233.1 MB in the beginning and 236.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 543359.34 ms. Allocated memory was 255.9 MB in the beginning and 528.5 MB in the end (delta: 272.6 MB). Free memory was 236.3 MB in the beginning and 485.5 MB in the end (delta: -249.2 MB). Peak memory consumption was 321.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 543.3s, OverallIterations: 87, TraceHistogramMax: 2, AutomataDifference: 360.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3603 SDtfs, 18605 SDslu, 26930 SDs, 0 SdLazy, 48998 SolverSat, 3087 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4636 GetRequests, 1564 SyntacticMatches, 72 SemanticMatches, 3000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37540 ImplicationChecksByTransitivity, 364.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1904occurred in iteration=86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 86 MinimizatonAttempts, 65428 StatesRemovedByMinimization, 86 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 156.4s InterpolantComputationTime, 4206 NumberOfCodeBlocks, 4206 NumberOfCodeBlocksAsserted, 268 NumberOfCheckSat, 4037 ConstructedInterpolants, 85 QuantifiedInterpolants, 3077040 SizeOfPredicates, 450 NumberOfNonLiveVariables, 5434 ConjunctsInSsa, 1520 ConjunctsInUnsatCore, 169 InterpolantComputations, 3 PerfectInterpolantSequences, 107/962 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