/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:03:47,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:03:47,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:03:47,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:03:47,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 22:03:47,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:03:47,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:03:47,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:03:47,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:03:47,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:03:47,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:03:47,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:03:47,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:03:47,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:03:47,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:03:47,921 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:03:47,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:03:47,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:03:48,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:03:48,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:03:48,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:03:48,155 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:03:48,157 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:03:48,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl [2021-03-10 22:03:48,157 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-subst.wvr.bpl' [2021-03-10 22:03:48,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:03:48,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:03:48,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:03:48,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:03:48,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:03:48,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:03:48,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:03:48,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:03:48,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:03:48,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:03:48,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:03:48,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:03:48,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:03:48,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:03:48,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:03:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:03:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:03:48,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:03:48,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:03:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:03:48,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:03:48,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:03:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:03:48,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:03:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:03:48,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:03:48,327 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:03:48,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:03:48,733 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 22:03:48,735 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:03:48 BoogieIcfgContainer [2021-03-10 22:03:48,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:03:48,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:03:48,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:03:48,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:03:48,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/2) ... [2021-03-10 22:03:48,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731cabd5 and model type nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:03:48, skipping insertion in model container [2021-03-10 22:03:48,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:03:48" (2/2) ... [2021-03-10 22:03:48,747 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-subst.wvr.bpl [2021-03-10 22:03:48,750 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:03:48,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:03:48,755 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:03:48,755 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:03:48,801 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 22:03:48,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 22:03:48,838 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:03:48,838 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:03:48,838 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:03:48,838 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:03:48,838 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:03:48,839 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:03:48,839 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:03:48,839 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:03:48,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-03-10 22:03:48,864 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:48,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:48,873 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:48,874 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-03-10 22:03:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:48,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337617658] [2021-03-10 22:03:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337617658] [2021-03-10 22:03:49,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525151105] [2021-03-10 22:03:49,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:49,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:49,242 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,497 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-03-10 22:03:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,510 INFO L225 Difference]: With dead ends: 265 [2021-03-10 22:03:49,510 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 22:03:49,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 22:03:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-03-10 22:03:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-03-10 22:03:49,545 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-03-10 22:03:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,546 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-03-10 22:03:49,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-03-10 22:03:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:49,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,547 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:03:49,548 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-03-10 22:03:49,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221817344] [2021-03-10 22:03:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221817344] [2021-03-10 22:03:49,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:49,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342029299] [2021-03-10 22:03:49,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:49,669 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,805 INFO L93 Difference]: Finished difference Result 278 states and 851 transitions. [2021-03-10 22:03:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,808 INFO L225 Difference]: With dead ends: 278 [2021-03-10 22:03:49,808 INFO L226 Difference]: Without dead ends: 263 [2021-03-10 22:03:49,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-03-10 22:03:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 132. [2021-03-10 22:03:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-03-10 22:03:49,818 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-03-10 22:03:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,818 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-03-10 22:03:49,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-03-10 22:03:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:49,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,819 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:03:49,819 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-03-10 22:03:49,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338765242] [2021-03-10 22:03:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338765242] [2021-03-10 22:03:49,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:49,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326564576] [2021-03-10 22:03:49,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:49,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:49,986 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,117 INFO L93 Difference]: Finished difference Result 260 states and 768 transitions. [2021-03-10 22:03:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,119 INFO L225 Difference]: With dead ends: 260 [2021-03-10 22:03:50,119 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 22:03:50,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 22:03:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 140. [2021-03-10 22:03:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-03-10 22:03:50,126 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-03-10 22:03:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,127 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-03-10 22:03:50,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-03-10 22:03:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:50,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,128 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:03:50,128 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-03-10 22:03:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496507192] [2021-03-10 22:03:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496507192] [2021-03-10 22:03:50,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:50,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651500541] [2021-03-10 22:03:50,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:50,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:50,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:50,192 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,344 INFO L93 Difference]: Finished difference Result 304 states and 944 transitions. [2021-03-10 22:03:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,346 INFO L225 Difference]: With dead ends: 304 [2021-03-10 22:03:50,346 INFO L226 Difference]: Without dead ends: 289 [2021-03-10 22:03:50,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-03-10 22:03:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 140. [2021-03-10 22:03:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-03-10 22:03:50,353 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-03-10 22:03:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,353 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-03-10 22:03:50,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-03-10 22:03:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:50,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,355 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:03:50,355 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-03-10 22:03:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399620065] [2021-03-10 22:03:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399620065] [2021-03-10 22:03:50,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:50,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873076985] [2021-03-10 22:03:50,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:50,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:50,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:50,448 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,577 INFO L93 Difference]: Finished difference Result 371 states and 1217 transitions. [2021-03-10 22:03:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:03:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,579 INFO L225 Difference]: With dead ends: 371 [2021-03-10 22:03:50,579 INFO L226 Difference]: Without dead ends: 356 [2021-03-10 22:03:50,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:03:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-10 22:03:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 142. [2021-03-10 22:03:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-03-10 22:03:50,585 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-03-10 22:03:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,585 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-03-10 22:03:50,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-03-10 22:03:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:50,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,586 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:03:50,586 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-03-10 22:03:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523011447] [2021-03-10 22:03:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523011447] [2021-03-10 22:03:50,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348614359] [2021-03-10 22:03:50,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:50,668 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,808 INFO L93 Difference]: Finished difference Result 295 states and 918 transitions. [2021-03-10 22:03:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,810 INFO L225 Difference]: With dead ends: 295 [2021-03-10 22:03:50,810 INFO L226 Difference]: Without dead ends: 280 [2021-03-10 22:03:50,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-10 22:03:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 142. [2021-03-10 22:03:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-03-10 22:03:50,815 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-03-10 22:03:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,815 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-03-10 22:03:50,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-03-10 22:03:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:03:50,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,816 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 22:03:50,816 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-03-10 22:03:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704490411] [2021-03-10 22:03:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704490411] [2021-03-10 22:03:50,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:50,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811911303] [2021-03-10 22:03:50,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:50,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,828 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,831 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-03-10 22:03:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:03:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,832 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:03:50,833 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:03:50,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:03:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-03-10 22:03:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-03-10 22:03:50,837 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-03-10 22:03:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,837 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-03-10 22:03:50,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-03-10 22:03:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:03:50,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,837 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:03:50,838 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-03-10 22:03:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181095948] [2021-03-10 22:03:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181095948] [2021-03-10 22:03:50,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:50,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399415154] [2021-03-10 22:03:50,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:50,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,849 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,853 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-03-10 22:03:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:03:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,854 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:03:50,854 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:03:50,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:03:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-03-10 22:03:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-03-10 22:03:50,859 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-03-10 22:03:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,859 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-03-10 22:03:50,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-03-10 22:03:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:03:50,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,860 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 22:03:50,860 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-03-10 22:03:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510349596] [2021-03-10 22:03:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510349596] [2021-03-10 22:03:50,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394959691] [2021-03-10 22:03:50,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,872 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,876 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-03-10 22:03:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:03:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,877 INFO L225 Difference]: With dead ends: 223 [2021-03-10 22:03:50,877 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 22:03:50,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 22:03:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-03-10 22:03:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-03-10 22:03:50,882 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-03-10 22:03:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,882 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-03-10 22:03:50,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-03-10 22:03:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:50,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,883 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 22:03:50,883 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-03-10 22:03:50,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218526966] [2021-03-10 22:03:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:50,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218526966] [2021-03-10 22:03:50,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:50,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090843725] [2021-03-10 22:03:50,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:50,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:50,904 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,916 INFO L93 Difference]: Finished difference Result 385 states and 1193 transitions. [2021-03-10 22:03:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,920 INFO L225 Difference]: With dead ends: 385 [2021-03-10 22:03:50,920 INFO L226 Difference]: Without dead ends: 305 [2021-03-10 22:03:50,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-03-10 22:03:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 229. [2021-03-10 22:03:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.280701754385965) internal successors, (748), 228 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 748 transitions. [2021-03-10 22:03:50,926 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 748 transitions. Word has length 16 [2021-03-10 22:03:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,927 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 748 transitions. [2021-03-10 22:03:50,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 748 transitions. [2021-03-10 22:03:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:50,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,927 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 22:03:50,928 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,928 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-03-10 22:03:50,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294689452] [2021-03-10 22:03:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294689452] [2021-03-10 22:03:50,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874547353] [2021-03-10 22:03:50,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:50,944 INFO L87 Difference]: Start difference. First operand 229 states and 748 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,954 INFO L93 Difference]: Finished difference Result 370 states and 1123 transitions. [2021-03-10 22:03:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,956 INFO L225 Difference]: With dead ends: 370 [2021-03-10 22:03:50,956 INFO L226 Difference]: Without dead ends: 287 [2021-03-10 22:03:50,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-03-10 22:03:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 232. [2021-03-10 22:03:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.272727272727273) internal successors, (756), 231 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 756 transitions. [2021-03-10 22:03:50,962 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 756 transitions. Word has length 16 [2021-03-10 22:03:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,963 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 756 transitions. [2021-03-10 22:03:50,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 756 transitions. [2021-03-10 22:03:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:50,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,963 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 22:03:50,964 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-03-10 22:03:50,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517108200] [2021-03-10 22:03:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517108200] [2021-03-10 22:03:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582393930] [2021-03-10 22:03:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:03:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:51,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:03:51,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072239847] [2021-03-10 22:03:51,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:03:51,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:03:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:51,150 INFO L87 Difference]: Start difference. First operand 232 states and 756 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:51,217 INFO L93 Difference]: Finished difference Result 376 states and 1097 transitions. [2021-03-10 22:03:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:51,219 INFO L225 Difference]: With dead ends: 376 [2021-03-10 22:03:51,219 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 22:03:51,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:03:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 22:03:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 232. [2021-03-10 22:03:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.2337662337662336) internal successors, (747), 231 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 747 transitions. [2021-03-10 22:03:51,229 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 747 transitions. Word has length 16 [2021-03-10 22:03:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:51,229 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 747 transitions. [2021-03-10 22:03:51,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 747 transitions. [2021-03-10 22:03:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:51,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:51,230 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:51,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 22:03:51,444 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1703674642, now seen corresponding path program 2 times [2021-03-10 22:03:51,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:51,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140515684] [2021-03-10 22:03:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140515684] [2021-03-10 22:03:51,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026612521] [2021-03-10 22:03:51,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:51,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:03:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:51,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:03:51,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380107624] [2021-03-10 22:03:51,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:03:51,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:51,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:03:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:51,587 INFO L87 Difference]: Start difference. First operand 232 states and 747 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:51,696 INFO L93 Difference]: Finished difference Result 556 states and 1605 transitions. [2021-03-10 22:03:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:03:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:51,699 INFO L225 Difference]: With dead ends: 556 [2021-03-10 22:03:51,699 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 22:03:51,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:03:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 22:03:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 244. [2021-03-10 22:03:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.2181069958847734) internal successors, (782), 243 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 782 transitions. [2021-03-10 22:03:51,710 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 782 transitions. Word has length 16 [2021-03-10 22:03:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:51,710 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 782 transitions. [2021-03-10 22:03:51,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 782 transitions. [2021-03-10 22:03:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:51,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:51,711 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:51,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 22:03:51,929 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 2 times [2021-03-10 22:03:51,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:51,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875499176] [2021-03-10 22:03:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:51,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875499176] [2021-03-10 22:03:51,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:51,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:51,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689155794] [2021-03-10 22:03:51,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:51,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:51,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:51,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:51,955 INFO L87 Difference]: Start difference. First operand 244 states and 782 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,008 INFO L93 Difference]: Finished difference Result 428 states and 1250 transitions. [2021-03-10 22:03:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,010 INFO L225 Difference]: With dead ends: 428 [2021-03-10 22:03:52,010 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 22:03:52,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 22:03:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 215. [2021-03-10 22:03:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.177570093457944) internal successors, (680), 214 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 680 transitions. [2021-03-10 22:03:52,016 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 680 transitions. Word has length 16 [2021-03-10 22:03:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,016 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 680 transitions. [2021-03-10 22:03:52,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 680 transitions. [2021-03-10 22:03:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:52,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,017 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 22:03:52,017 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 3 times [2021-03-10 22:03:52,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078352878] [2021-03-10 22:03:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:52,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078352878] [2021-03-10 22:03:52,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:52,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718325451] [2021-03-10 22:03:52,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:52,053 INFO L87 Difference]: Start difference. First operand 215 states and 680 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,092 INFO L93 Difference]: Finished difference Result 385 states and 1123 transitions. [2021-03-10 22:03:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,095 INFO L225 Difference]: With dead ends: 385 [2021-03-10 22:03:52,095 INFO L226 Difference]: Without dead ends: 358 [2021-03-10 22:03:52,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:03:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-03-10 22:03:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 215. [2021-03-10 22:03:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1682242990654204) internal successors, (678), 214 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 678 transitions. [2021-03-10 22:03:52,103 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 678 transitions. Word has length 16 [2021-03-10 22:03:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,103 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 678 transitions. [2021-03-10 22:03:52,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 678 transitions. [2021-03-10 22:03:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:52,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,104 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 22:03:52,104 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-03-10 22:03:52,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787345450] [2021-03-10 22:03:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:52,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787345450] [2021-03-10 22:03:52,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:52,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125399857] [2021-03-10 22:03:52,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:52,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:52,160 INFO L87 Difference]: Start difference. First operand 215 states and 678 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,193 INFO L93 Difference]: Finished difference Result 369 states and 1047 transitions. [2021-03-10 22:03:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,194 INFO L225 Difference]: With dead ends: 369 [2021-03-10 22:03:52,194 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 22:03:52,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:03:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 22:03:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 215. [2021-03-10 22:03:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1588785046728973) internal successors, (676), 214 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 676 transitions. [2021-03-10 22:03:52,200 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 676 transitions. Word has length 16 [2021-03-10 22:03:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,200 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 676 transitions. [2021-03-10 22:03:52,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 676 transitions. [2021-03-10 22:03:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:52,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,202 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-10 22:03:52,203 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1742439980, now seen corresponding path program 4 times [2021-03-10 22:03:52,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434436201] [2021-03-10 22:03:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434436201] [2021-03-10 22:03:52,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012006733] [2021-03-10 22:03:52,232 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:03:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:52,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 22:03:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270657215] [2021-03-10 22:03:52,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:03:52,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:03:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:03:52,348 INFO L87 Difference]: Start difference. First operand 215 states and 676 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,402 INFO L93 Difference]: Finished difference Result 355 states and 997 transitions. [2021-03-10 22:03:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,403 INFO L225 Difference]: With dead ends: 355 [2021-03-10 22:03:52,404 INFO L226 Difference]: Without dead ends: 309 [2021-03-10 22:03:52,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:03:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-10 22:03:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 211. [2021-03-10 22:03:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1714285714285713) internal successors, (666), 210 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 666 transitions. [2021-03-10 22:03:52,409 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 666 transitions. Word has length 16 [2021-03-10 22:03:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,409 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 666 transitions. [2021-03-10 22:03:52,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 666 transitions. [2021-03-10 22:03:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:52,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,410 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:03:52,612 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -556629742, now seen corresponding path program 5 times [2021-03-10 22:03:52,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866138391] [2021-03-10 22:03:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:52,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866138391] [2021-03-10 22:03:52,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:52,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601972673] [2021-03-10 22:03:52,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:52,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:52,640 INFO L87 Difference]: Start difference. First operand 211 states and 666 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,694 INFO L93 Difference]: Finished difference Result 346 states and 975 transitions. [2021-03-10 22:03:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,696 INFO L225 Difference]: With dead ends: 346 [2021-03-10 22:03:52,696 INFO L226 Difference]: Without dead ends: 319 [2021-03-10 22:03:52,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-03-10 22:03:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 211. [2021-03-10 22:03:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1619047619047618) internal successors, (664), 210 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 664 transitions. [2021-03-10 22:03:52,701 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 664 transitions. Word has length 16 [2021-03-10 22:03:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,701 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 664 transitions. [2021-03-10 22:03:52,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 664 transitions. [2021-03-10 22:03:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:52,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,702 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-10 22:03:52,702 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1337504340, now seen corresponding path program 6 times [2021-03-10 22:03:52,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331085514] [2021-03-10 22:03:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331085514] [2021-03-10 22:03:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799969081] [2021-03-10 22:03:52,735 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:52,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:03:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:52,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 22:03:52,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390089871] [2021-03-10 22:03:52,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:03:52,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:03:52,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:03:52,864 INFO L87 Difference]: Start difference. First operand 211 states and 664 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,020 INFO L93 Difference]: Finished difference Result 550 states and 1584 transitions. [2021-03-10 22:03:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,023 INFO L225 Difference]: With dead ends: 550 [2021-03-10 22:03:53,023 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:03:53,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:03:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 211. [2021-03-10 22:03:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.1523809523809523) internal successors, (662), 210 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 662 transitions. [2021-03-10 22:03:53,030 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 662 transitions. Word has length 16 [2021-03-10 22:03:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,030 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 662 transitions. [2021-03-10 22:03:53,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 662 transitions. [2021-03-10 22:03:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:53,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,031 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:53,243 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-03-10 22:03:53,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175860506] [2021-03-10 22:03:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175860506] [2021-03-10 22:03:53,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:03:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258813259] [2021-03-10 22:03:53,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:03:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:03:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:53,286 INFO L87 Difference]: Start difference. First operand 211 states and 662 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,327 INFO L93 Difference]: Finished difference Result 340 states and 952 transitions. [2021-03-10 22:03:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:03:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,328 INFO L225 Difference]: With dead ends: 340 [2021-03-10 22:03:53,328 INFO L226 Difference]: Without dead ends: 303 [2021-03-10 22:03:53,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-03-10 22:03:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 203. [2021-03-10 22:03:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.118811881188119) internal successors, (630), 202 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 630 transitions. [2021-03-10 22:03:53,334 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 630 transitions. Word has length 16 [2021-03-10 22:03:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,334 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 630 transitions. [2021-03-10 22:03:53,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 630 transitions. [2021-03-10 22:03:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:03:53,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,335 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-10 22:03:53,335 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash -682046510, now seen corresponding path program 4 times [2021-03-10 22:03:53,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944935479] [2021-03-10 22:03:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944935479] [2021-03-10 22:03:53,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717050055] [2021-03-10 22:03:53,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,352 INFO L87 Difference]: Start difference. First operand 203 states and 630 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,364 INFO L93 Difference]: Finished difference Result 240 states and 711 transitions. [2021-03-10 22:03:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:03:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,365 INFO L225 Difference]: With dead ends: 240 [2021-03-10 22:03:53,365 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 22:03:53,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 22:03:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-03-10 22:03:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.126315789473684) internal successors, (594), 190 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 594 transitions. [2021-03-10 22:03:53,368 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 594 transitions. Word has length 16 [2021-03-10 22:03:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,368 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 594 transitions. [2021-03-10 22:03:53,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 594 transitions. [2021-03-10 22:03:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:03:53,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,370 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-10 22:03:53,370 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -720277718, now seen corresponding path program 1 times [2021-03-10 22:03:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348352891] [2021-03-10 22:03:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348352891] [2021-03-10 22:03:53,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809462919] [2021-03-10 22:03:53,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,386 INFO L87 Difference]: Start difference. First operand 191 states and 594 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,394 INFO L93 Difference]: Finished difference Result 281 states and 830 transitions. [2021-03-10 22:03:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:03:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,395 INFO L225 Difference]: With dead ends: 281 [2021-03-10 22:03:53,395 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 22:03:53,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 22:03:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 228. [2021-03-10 22:03:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.101321585903084) internal successors, (704), 227 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 704 transitions. [2021-03-10 22:03:53,400 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 704 transitions. Word has length 18 [2021-03-10 22:03:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,400 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 704 transitions. [2021-03-10 22:03:53,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 704 transitions. [2021-03-10 22:03:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:03:53,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,400 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-10 22:03:53,401 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 147207058, now seen corresponding path program 1 times [2021-03-10 22:03:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150638251] [2021-03-10 22:03:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150638251] [2021-03-10 22:03:53,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832744075] [2021-03-10 22:03:53,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,415 INFO L87 Difference]: Start difference. First operand 228 states and 704 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,422 INFO L93 Difference]: Finished difference Result 295 states and 875 transitions. [2021-03-10 22:03:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:03:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,423 INFO L225 Difference]: With dead ends: 295 [2021-03-10 22:03:53,423 INFO L226 Difference]: Without dead ends: 295 [2021-03-10 22:03:53,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-03-10 22:03:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 248. [2021-03-10 22:03:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0931174089068825) internal successors, (764), 247 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 764 transitions. [2021-03-10 22:03:53,428 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 764 transitions. Word has length 18 [2021-03-10 22:03:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,429 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 764 transitions. [2021-03-10 22:03:53,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 764 transitions. [2021-03-10 22:03:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:03:53,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,430 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-10 22:03:53,430 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash -992379222, now seen corresponding path program 2 times [2021-03-10 22:03:53,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655270873] [2021-03-10 22:03:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655270873] [2021-03-10 22:03:53,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415978161] [2021-03-10 22:03:53,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,454 INFO L87 Difference]: Start difference. First operand 248 states and 764 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,461 INFO L93 Difference]: Finished difference Result 256 states and 763 transitions. [2021-03-10 22:03:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:03:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,462 INFO L225 Difference]: With dead ends: 256 [2021-03-10 22:03:53,462 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 22:03:53,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 22:03:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-03-10 22:03:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 3.0142857142857142) internal successors, (633), 210 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2021-03-10 22:03:53,466 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 18 [2021-03-10 22:03:53,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,466 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2021-03-10 22:03:53,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2021-03-10 22:03:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:03:53,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,467 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-10 22:03:53,468 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1817656876, now seen corresponding path program 3 times [2021-03-10 22:03:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642759240] [2021-03-10 22:03:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:03:53,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642759240] [2021-03-10 22:03:53,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771720533] [2021-03-10 22:03:53,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,485 INFO L87 Difference]: Start difference. First operand 211 states and 633 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,490 INFO L93 Difference]: Finished difference Result 219 states and 645 transitions. [2021-03-10 22:03:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:03:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,492 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:03:53,492 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 22:03:53,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 22:03:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-03-10 22:03:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 3.0240384615384617) internal successors, (629), 208 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 629 transitions. [2021-03-10 22:03:53,498 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 629 transitions. Word has length 18 [2021-03-10 22:03:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,499 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 629 transitions. [2021-03-10 22:03:53,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 629 transitions. [2021-03-10 22:03:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:03:53,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,500 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-10 22:03:53,500 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1352829548, now seen corresponding path program 2 times [2021-03-10 22:03:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833762850] [2021-03-10 22:03:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:53,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833762850] [2021-03-10 22:03:53,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:53,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:53,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409569602] [2021-03-10 22:03:53,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:53,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,526 INFO L87 Difference]: Start difference. First operand 209 states and 629 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,531 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2021-03-10 22:03:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:03:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,532 INFO L225 Difference]: With dead ends: 209 [2021-03-10 22:03:53,532 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 22:03:53,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 22:03:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 189. [2021-03-10 22:03:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-03-10 22:03:53,535 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-03-10 22:03:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,535 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-03-10 22:03:53,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-03-10 22:03:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:53,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,536 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-10 22:03:53,537 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-03-10 22:03:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642588450] [2021-03-10 22:03:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642588450] [2021-03-10 22:03:53,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104647151] [2021-03-10 22:03:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:03:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:54,330 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:03:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:54,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517910938] [2021-03-10 22:03:54,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:54,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:54,439 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:54,892 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 22:03:55,060 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 22:03:55,351 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-03-10 22:03:55,679 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 22:03:55,830 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:03:56,126 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-03-10 22:03:56,341 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-03-10 22:03:56,488 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:03:56,788 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-03-10 22:03:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:56,824 INFO L93 Difference]: Finished difference Result 573 states and 1653 transitions. [2021-03-10 22:03:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:03:56,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:03:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:56,826 INFO L225 Difference]: With dead ends: 573 [2021-03-10 22:03:56,826 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 22:03:56,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2550.5ms TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:03:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 22:03:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 249. [2021-03-10 22:03:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.975806451612903) internal successors, (738), 248 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 738 transitions. [2021-03-10 22:03:56,832 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 738 transitions. Word has length 20 [2021-03-10 22:03:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:56,832 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 738 transitions. [2021-03-10 22:03:56,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 738 transitions. [2021-03-10 22:03:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:56,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:56,833 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:57,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:03:57,051 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1376626424, now seen corresponding path program 2 times [2021-03-10 22:03:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:57,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827339911] [2021-03-10 22:03:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827339911] [2021-03-10 22:03:57,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331198476] [2021-03-10 22:03:57,308 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:57,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:57,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:03:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:57,675 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:03:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:57,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:57,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222361058] [2021-03-10 22:03:57,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:57,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:57,929 INFO L87 Difference]: Start difference. First operand 249 states and 738 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,734 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 22:03:59,043 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 22:03:59,537 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-10 22:03:59,785 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 22:03:59,988 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-03-10 22:04:00,155 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-03-10 22:04:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:00,170 INFO L93 Difference]: Finished difference Result 618 states and 1792 transitions. [2021-03-10 22:04:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:04:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:00,172 INFO L225 Difference]: With dead ends: 618 [2021-03-10 22:04:00,172 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 22:04:00,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2455.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:04:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 22:04:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 266. [2021-03-10 22:04:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9924528301886792) internal successors, (793), 265 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 793 transitions. [2021-03-10 22:04:00,178 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 793 transitions. Word has length 20 [2021-03-10 22:04:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:00,178 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 793 transitions. [2021-03-10 22:04:00,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 793 transitions. [2021-03-10 22:04:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:00,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:00,179 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,396 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash -191544444, now seen corresponding path program 3 times [2021-03-10 22:04:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25018350] [2021-03-10 22:04:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25018350] [2021-03-10 22:04:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751100502] [2021-03-10 22:04:00,604 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:00,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,036 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:04:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018358992] [2021-03-10 22:04:01,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:01,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:01,240 INFO L87 Difference]: Start difference. First operand 266 states and 793 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,759 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 22:04:02,260 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 22:04:02,510 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 22:04:02,746 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-10 22:04:03,090 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-10 22:04:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:03,126 INFO L93 Difference]: Finished difference Result 598 states and 1739 transitions. [2021-03-10 22:04:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:04:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:03,128 INFO L225 Difference]: With dead ends: 598 [2021-03-10 22:04:03,128 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 22:04:03,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2084.8ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:04:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 22:04:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 270. [2021-03-10 22:04:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.992565055762082) internal successors, (805), 269 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 805 transitions. [2021-03-10 22:04:03,134 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 805 transitions. Word has length 20 [2021-03-10 22:04:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:03,134 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 805 transitions. [2021-03-10 22:04:03,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 805 transitions. [2021-03-10 22:04:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:03,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:03,135 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:03,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,351 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1568508496, now seen corresponding path program 4 times [2021-03-10 22:04:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924296581] [2021-03-10 22:04:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924296581] [2021-03-10 22:04:03,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67289469] [2021-03-10 22:04:03,547 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:04:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:04,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622360174] [2021-03-10 22:04:04,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:04,155 INFO L87 Difference]: Start difference. First operand 270 states and 805 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,888 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 22:04:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:05,225 INFO L93 Difference]: Finished difference Result 591 states and 1723 transitions. [2021-03-10 22:04:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:04:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:05,228 INFO L225 Difference]: With dead ends: 591 [2021-03-10 22:04:05,228 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:04:05,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1292.0ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:04:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:04:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 273. [2021-03-10 22:04:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0036764705882355) internal successors, (817), 272 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 817 transitions. [2021-03-10 22:04:05,233 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 817 transitions. Word has length 20 [2021-03-10 22:04:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:05,233 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 817 transitions. [2021-03-10 22:04:05,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 817 transitions. [2021-03-10 22:04:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:05,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:05,234 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,434 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 5 times [2021-03-10 22:04:05,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596253644] [2021-03-10 22:04:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596253644] [2021-03-10 22:04:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367281645] [2021-03-10 22:04:05,740 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:05,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:06,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:04:06,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53631203] [2021-03-10 22:04:06,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:04:06,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:04:06,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:06,278 INFO L87 Difference]: Start difference. First operand 273 states and 817 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,618 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:04:06,762 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:04:06,987 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-10 22:04:07,177 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-10 22:04:07,477 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-03-10 22:04:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:07,703 INFO L93 Difference]: Finished difference Result 524 states and 1518 transitions. [2021-03-10 22:04:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:04:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:07,705 INFO L225 Difference]: With dead ends: 524 [2021-03-10 22:04:07,705 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 22:04:07,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1754.5ms TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:04:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 22:04:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 282. [2021-03-10 22:04:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.99288256227758) internal successors, (841), 281 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-03-10 22:04:07,710 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 20 [2021-03-10 22:04:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:07,710 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-03-10 22:04:07,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-03-10 22:04:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:07,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:07,711 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:07,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,925 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash -700537316, now seen corresponding path program 6 times [2021-03-10 22:04:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:07,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528327153] [2021-03-10 22:04:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528327153] [2021-03-10 22:04:08,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512489048] [2021-03-10 22:04:08,098 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:08,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:08,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776325800] [2021-03-10 22:04:08,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:08,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:08,664 INFO L87 Difference]: Start difference. First operand 282 states and 841 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,916 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:04:09,184 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-10 22:04:09,445 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 22:04:09,694 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-10 22:04:09,966 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-10 22:04:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:10,129 INFO L93 Difference]: Finished difference Result 559 states and 1609 transitions. [2021-03-10 22:04:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:04:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:10,131 INFO L225 Difference]: With dead ends: 559 [2021-03-10 22:04:10,131 INFO L226 Difference]: Without dead ends: 529 [2021-03-10 22:04:10,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1696.0ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:04:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-10 22:04:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 295. [2021-03-10 22:04:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0408163265306123) internal successors, (894), 294 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 894 transitions. [2021-03-10 22:04:10,137 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 894 transitions. Word has length 20 [2021-03-10 22:04:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:10,137 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 894 transitions. [2021-03-10 22:04:10,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 894 transitions. [2021-03-10 22:04:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:10,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:10,137 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:10,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 22:04:10,355 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash -348161626, now seen corresponding path program 7 times [2021-03-10 22:04:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:10,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746652256] [2021-03-10 22:04:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746652256] [2021-03-10 22:04:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292847228] [2021-03-10 22:04:10,506 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:04:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:10,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491916368] [2021-03-10 22:04:10,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:10,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:10,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:10,990 INFO L87 Difference]: Start difference. First operand 295 states and 894 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,369 INFO L93 Difference]: Finished difference Result 474 states and 1398 transitions. [2021-03-10 22:04:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,371 INFO L225 Difference]: With dead ends: 474 [2021-03-10 22:04:11,371 INFO L226 Difference]: Without dead ends: 459 [2021-03-10 22:04:11,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-03-10 22:04:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 298. [2021-03-10 22:04:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.037037037037037) internal successors, (902), 297 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 902 transitions. [2021-03-10 22:04:11,376 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 902 transitions. Word has length 20 [2021-03-10 22:04:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,376 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 902 transitions. [2021-03-10 22:04:11,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 902 transitions. [2021-03-10 22:04:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:11,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:11,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,583 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1349083318, now seen corresponding path program 8 times [2021-03-10 22:04:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:11,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703291611] [2021-03-10 22:04:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703291611] [2021-03-10 22:04:11,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103092627] [2021-03-10 22:04:11,818 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:11,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:12,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:12,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557394066] [2021-03-10 22:04:12,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:12,288 INFO L87 Difference]: Start difference. First operand 298 states and 902 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,296 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:04:13,597 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 22:04:14,002 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 22:04:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:14,028 INFO L93 Difference]: Finished difference Result 639 states and 1826 transitions. [2021-03-10 22:04:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:04:14,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:14,030 INFO L225 Difference]: With dead ends: 639 [2021-03-10 22:04:14,030 INFO L226 Difference]: Without dead ends: 594 [2021-03-10 22:04:14,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1915.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:04:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-03-10 22:04:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 315. [2021-03-10 22:04:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0636942675159236) internal successors, (962), 314 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 962 transitions. [2021-03-10 22:04:14,035 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 962 transitions. Word has length 20 [2021-03-10 22:04:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:14,035 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 962 transitions. [2021-03-10 22:04:14,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 962 transitions. [2021-03-10 22:04:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:14,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:14,036 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:14,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 22:04:14,247 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2112101588, now seen corresponding path program 9 times [2021-03-10 22:04:14,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:14,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972861925] [2021-03-10 22:04:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:14,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972861925] [2021-03-10 22:04:14,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943159497] [2021-03-10 22:04:14,597 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:14,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:04:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:15,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464227449] [2021-03-10 22:04:15,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:15,149 INFO L87 Difference]: Start difference. First operand 315 states and 962 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,400 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 22:04:15,977 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-03-10 22:04:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:15,982 INFO L93 Difference]: Finished difference Result 558 states and 1645 transitions. [2021-03-10 22:04:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:15,985 INFO L225 Difference]: With dead ends: 558 [2021-03-10 22:04:15,985 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 22:04:15,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1251.4ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:04:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 22:04:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 320. [2021-03-10 22:04:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0783699059561127) internal successors, (982), 319 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 982 transitions. [2021-03-10 22:04:15,989 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 982 transitions. Word has length 20 [2021-03-10 22:04:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:15,990 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 982 transitions. [2021-03-10 22:04:15,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 982 transitions. [2021-03-10 22:04:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:15,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:15,990 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:16,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 22:04:16,205 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -688262744, now seen corresponding path program 10 times [2021-03-10 22:04:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:16,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206423333] [2021-03-10 22:04:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206423333] [2021-03-10 22:04:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802929495] [2021-03-10 22:04:16,507 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:16,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:16,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:16,892 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 22:04:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:17,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:17,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356801617] [2021-03-10 22:04:17,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:17,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:17,114 INFO L87 Difference]: Start difference. First operand 320 states and 982 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,663 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:04:17,889 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:04:18,124 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 22:04:18,315 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 22:04:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:18,422 INFO L93 Difference]: Finished difference Result 574 states and 1669 transitions. [2021-03-10 22:04:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:04:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:18,424 INFO L225 Difference]: With dead ends: 574 [2021-03-10 22:04:18,424 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:04:18,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1704.3ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:04:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:04:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 327. [2021-03-10 22:04:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.058282208588957) internal successors, (997), 326 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 997 transitions. [2021-03-10 22:04:18,429 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 997 transitions. Word has length 20 [2021-03-10 22:04:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:18,429 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 997 transitions. [2021-03-10 22:04:18,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 997 transitions. [2021-03-10 22:04:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:18,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:18,430 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:18,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,639 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:18,639 INFO L82 PathProgramCache]: Analyzing trace with hash -997783728, now seen corresponding path program 11 times [2021-03-10 22:04:18,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:18,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776711032] [2021-03-10 22:04:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776711032] [2021-03-10 22:04:18,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353687508] [2021-03-10 22:04:18,847 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:19,399 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:04:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:19,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:04:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397931163] [2021-03-10 22:04:19,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:04:19,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:04:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:19,560 INFO L87 Difference]: Start difference. First operand 327 states and 997 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,959 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-10 22:04:20,591 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-10 22:04:20,985 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-03-10 22:04:21,155 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-03-10 22:04:21,523 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-03-10 22:04:21,902 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2021-03-10 22:04:22,080 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-03-10 22:04:22,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-03-10 22:04:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:22,230 INFO L93 Difference]: Finished difference Result 711 states and 2041 transitions. [2021-03-10 22:04:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:04:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:22,232 INFO L225 Difference]: With dead ends: 711 [2021-03-10 22:04:22,232 INFO L226 Difference]: Without dead ends: 636 [2021-03-10 22:04:22,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2936.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:04:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-03-10 22:04:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 336. [2021-03-10 22:04:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.056716417910448) internal successors, (1024), 335 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-03-10 22:04:22,246 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-03-10 22:04:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:22,246 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-03-10 22:04:22,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-03-10 22:04:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:22,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:22,247 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:22,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-10 22:04:22,465 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1210228068, now seen corresponding path program 12 times [2021-03-10 22:04:22,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:22,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774410145] [2021-03-10 22:04:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774410145] [2021-03-10 22:04:22,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629374287] [2021-03-10 22:04:22,748 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:22,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:04:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:23,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567856321] [2021-03-10 22:04:23,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:23,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:23,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:23,293 INFO L87 Difference]: Start difference. First operand 336 states and 1024 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:23,744 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-10 22:04:23,954 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-03-10 22:04:24,102 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-10 22:04:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:24,214 INFO L93 Difference]: Finished difference Result 581 states and 1708 transitions. [2021-03-10 22:04:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:04:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:24,216 INFO L225 Difference]: With dead ends: 581 [2021-03-10 22:04:24,216 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 22:04:24,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1253.3ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:04:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 22:04:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 342. [2021-03-10 22:04:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.070381231671554) internal successors, (1047), 341 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1047 transitions. [2021-03-10 22:04:24,222 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1047 transitions. Word has length 20 [2021-03-10 22:04:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:24,222 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1047 transitions. [2021-03-10 22:04:24,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1047 transitions. [2021-03-10 22:04:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:24,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:24,222 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:24,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,424 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash 762269212, now seen corresponding path program 13 times [2021-03-10 22:04:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:24,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457506284] [2021-03-10 22:04:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457506284] [2021-03-10 22:04:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934641187] [2021-03-10 22:04:24,606 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:25,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:25,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377215105] [2021-03-10 22:04:25,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:25,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:25,140 INFO L87 Difference]: Start difference. First operand 342 states and 1047 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,494 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 22:04:25,867 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:04:26,133 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-03-10 22:04:26,447 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 22:04:26,778 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 22:04:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:26,795 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-03-10 22:04:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:04:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:26,797 INFO L225 Difference]: With dead ends: 671 [2021-03-10 22:04:26,797 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 22:04:26,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1853.5ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:04:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 22:04:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 343. [2021-03-10 22:04:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0760233918128654) internal successors, (1052), 342 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1052 transitions. [2021-03-10 22:04:26,803 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1052 transitions. Word has length 20 [2021-03-10 22:04:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:26,803 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1052 transitions. [2021-03-10 22:04:26,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1052 transitions. [2021-03-10 22:04:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:26,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:26,803 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:27,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-03-10 22:04:27,015 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -972310598, now seen corresponding path program 14 times [2021-03-10 22:04:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:27,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023050698] [2021-03-10 22:04:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023050698] [2021-03-10 22:04:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397466155] [2021-03-10 22:04:27,168 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:04:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:27,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929237869] [2021-03-10 22:04:27,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:27,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:27,617 INFO L87 Difference]: Start difference. First operand 343 states and 1052 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:28,023 INFO L93 Difference]: Finished difference Result 538 states and 1592 transitions. [2021-03-10 22:04:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:28,025 INFO L225 Difference]: With dead ends: 538 [2021-03-10 22:04:28,025 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 22:04:28,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 22:04:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 343. [2021-03-10 22:04:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0760233918128654) internal successors, (1052), 342 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1052 transitions. [2021-03-10 22:04:28,030 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1052 transitions. Word has length 20 [2021-03-10 22:04:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:28,031 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1052 transitions. [2021-03-10 22:04:28,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1052 transitions. [2021-03-10 22:04:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:28,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:28,031 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:28,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-03-10 22:04:28,243 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1147131350, now seen corresponding path program 15 times [2021-03-10 22:04:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:28,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665649123] [2021-03-10 22:04:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665649123] [2021-03-10 22:04:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654734772] [2021-03-10 22:04:28,507 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:28,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:04:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:29,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:29,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:29,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544709278] [2021-03-10 22:04:29,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:29,143 INFO L87 Difference]: Start difference. First operand 343 states and 1052 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,424 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 22:04:29,616 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 22:04:29,943 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 22:04:30,479 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-03-10 22:04:30,722 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-03-10 22:04:31,024 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2021-03-10 22:04:31,442 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-03-10 22:04:31,682 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2021-03-10 22:04:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:31,689 INFO L93 Difference]: Finished difference Result 791 states and 2308 transitions. [2021-03-10 22:04:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:04:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:31,691 INFO L225 Difference]: With dead ends: 791 [2021-03-10 22:04:31,691 INFO L226 Difference]: Without dead ends: 731 [2021-03-10 22:04:31,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2899.5ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:04:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-03-10 22:04:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 355. [2021-03-10 22:04:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1016949152542375) internal successors, (1098), 354 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1098 transitions. [2021-03-10 22:04:31,697 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1098 transitions. Word has length 20 [2021-03-10 22:04:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:31,697 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1098 transitions. [2021-03-10 22:04:31,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1098 transitions. [2021-03-10 22:04:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:31,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:31,698 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:31,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,911 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1635816502, now seen corresponding path program 16 times [2021-03-10 22:04:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:31,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911877660] [2021-03-10 22:04:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911877660] [2021-03-10 22:04:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104304320] [2021-03-10 22:04:32,118 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:32,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:32,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:32,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311413550] [2021-03-10 22:04:32,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:32,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:32,686 INFO L87 Difference]: Start difference. First operand 355 states and 1098 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,041 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:04:33,215 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:04:33,443 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 22:04:33,663 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-03-10 22:04:33,847 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-10 22:04:34,030 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-03-10 22:04:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:34,043 INFO L93 Difference]: Finished difference Result 674 states and 1977 transitions. [2021-03-10 22:04:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:34,045 INFO L225 Difference]: With dead ends: 674 [2021-03-10 22:04:34,045 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 22:04:34,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1660.3ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:04:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 22:04:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 355. [2021-03-10 22:04:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1016949152542375) internal successors, (1098), 354 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1098 transitions. [2021-03-10 22:04:34,050 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1098 transitions. Word has length 20 [2021-03-10 22:04:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:34,050 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1098 transitions. [2021-03-10 22:04:34,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1098 transitions. [2021-03-10 22:04:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:34,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:34,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:34,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,251 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1226089308, now seen corresponding path program 17 times [2021-03-10 22:04:34,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:34,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191270107] [2021-03-10 22:04:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191270107] [2021-03-10 22:04:34,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358251362] [2021-03-10 22:04:34,450 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:34,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:04:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967882433] [2021-03-10 22:04:34,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:04:34,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:34,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:04:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:34,981 INFO L87 Difference]: Start difference. First operand 355 states and 1098 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,494 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 22:04:35,701 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 22:04:35,948 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 22:04:36,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-03-10 22:04:36,381 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 22:04:36,564 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-10 22:04:36,755 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 22:04:37,039 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-03-10 22:04:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:37,052 INFO L93 Difference]: Finished difference Result 753 states and 2184 transitions. [2021-03-10 22:04:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:04:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:37,054 INFO L225 Difference]: With dead ends: 753 [2021-03-10 22:04:37,054 INFO L226 Difference]: Without dead ends: 723 [2021-03-10 22:04:37,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2247.7ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:04:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-03-10 22:04:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 352. [2021-03-10 22:04:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.094017094017094) internal successors, (1086), 351 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1086 transitions. [2021-03-10 22:04:37,060 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1086 transitions. Word has length 20 [2021-03-10 22:04:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:37,060 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1086 transitions. [2021-03-10 22:04:37,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1086 transitions. [2021-03-10 22:04:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:37,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:37,060 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:37,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,263 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 18 times [2021-03-10 22:04:37,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:37,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712514993] [2021-03-10 22:04:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712514993] [2021-03-10 22:04:37,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556280966] [2021-03-10 22:04:37,433 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:37,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:37,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:37,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:37,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883293815] [2021-03-10 22:04:37,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:37,939 INFO L87 Difference]: Start difference. First operand 352 states and 1086 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,485 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 22:04:38,808 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-03-10 22:04:38,966 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:04:39,182 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 22:04:39,418 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-03-10 22:04:39,597 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-10 22:04:39,787 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 22:04:39,902 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 22:04:40,223 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-03-10 22:04:40,396 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 22:04:40,532 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:04:40,796 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-03-10 22:04:41,016 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-03-10 22:04:41,213 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 22:04:41,337 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 22:04:41,704 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 22:04:41,907 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-03-10 22:04:42,065 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:04:42,334 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-10 22:04:42,563 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-03-10 22:04:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:42,710 INFO L93 Difference]: Finished difference Result 1117 states and 3217 transitions. [2021-03-10 22:04:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:04:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:42,712 INFO L225 Difference]: With dead ends: 1117 [2021-03-10 22:04:42,712 INFO L226 Difference]: Without dead ends: 1072 [2021-03-10 22:04:42,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 4750.9ms TimeCoverageRelationStatistics Valid=513, Invalid=2139, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:04:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-03-10 22:04:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 389. [2021-03-10 22:04:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.172680412371134) internal successors, (1231), 388 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1231 transitions. [2021-03-10 22:04:42,720 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1231 transitions. Word has length 20 [2021-03-10 22:04:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:42,720 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 1231 transitions. [2021-03-10 22:04:42,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1231 transitions. [2021-03-10 22:04:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:42,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:42,720 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:42,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:42,928 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash -547999362, now seen corresponding path program 19 times [2021-03-10 22:04:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:42,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940241128] [2021-03-10 22:04:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940241128] [2021-03-10 22:04:43,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161465025] [2021-03-10 22:04:43,092 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:43,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084870149] [2021-03-10 22:04:43,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:43,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:43,525 INFO L87 Difference]: Start difference. First operand 389 states and 1231 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:44,436 INFO L93 Difference]: Finished difference Result 624 states and 1880 transitions. [2021-03-10 22:04:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:44,437 INFO L225 Difference]: With dead ends: 624 [2021-03-10 22:04:44,437 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 22:04:44,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:04:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 22:04:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 392. [2021-03-10 22:04:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.1687979539641944) internal successors, (1239), 391 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1239 transitions. [2021-03-10 22:04:44,443 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1239 transitions. Word has length 20 [2021-03-10 22:04:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:44,443 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1239 transitions. [2021-03-10 22:04:44,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1239 transitions. [2021-03-10 22:04:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:44,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:44,443 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:44,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-03-10 22:04:44,644 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash 109805262, now seen corresponding path program 20 times [2021-03-10 22:04:44,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:44,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445921926] [2021-03-10 22:04:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445921926] [2021-03-10 22:04:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996019772] [2021-03-10 22:04:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:44,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:45,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:45,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808364711] [2021-03-10 22:04:45,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:45,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:45,323 INFO L87 Difference]: Start difference. First operand 392 states and 1239 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,900 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-10 22:04:46,068 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-03-10 22:04:46,186 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 22:04:46,514 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-03-10 22:04:46,704 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-03-10 22:04:46,888 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-03-10 22:04:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:46,915 INFO L93 Difference]: Finished difference Result 773 states and 2251 transitions. [2021-03-10 22:04:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:46,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:46,917 INFO L225 Difference]: With dead ends: 773 [2021-03-10 22:04:46,917 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 22:04:46,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:04:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 22:04:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 410. [2021-03-10 22:04:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.1466992665036675) internal successors, (1287), 409 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1287 transitions. [2021-03-10 22:04:46,923 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1287 transitions. Word has length 20 [2021-03-10 22:04:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:46,923 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1287 transitions. [2021-03-10 22:04:46,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1287 transitions. [2021-03-10 22:04:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:46,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:46,924 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:47,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,125 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1617829746, now seen corresponding path program 21 times [2021-03-10 22:04:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:47,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301057041] [2021-03-10 22:04:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301057041] [2021-03-10 22:04:47,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260237600] [2021-03-10 22:04:47,300 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:47,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:47,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9302712] [2021-03-10 22:04:47,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:47,848 INFO L87 Difference]: Start difference. First operand 410 states and 1287 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,623 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 22:04:48,773 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 22:04:48,915 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-03-10 22:04:49,059 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-10 22:04:49,174 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 22:04:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:49,211 INFO L93 Difference]: Finished difference Result 721 states and 2142 transitions. [2021-03-10 22:04:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:49,213 INFO L225 Difference]: With dead ends: 721 [2021-03-10 22:04:49,213 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 22:04:49,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1607.1ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:04:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 22:04:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 416. [2021-03-10 22:04:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.16144578313253) internal successors, (1312), 415 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1312 transitions. [2021-03-10 22:04:49,218 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1312 transitions. Word has length 20 [2021-03-10 22:04:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:49,219 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1312 transitions. [2021-03-10 22:04:49,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1312 transitions. [2021-03-10 22:04:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:49,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:49,219 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:49,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-03-10 22:04:49,420 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 526986350, now seen corresponding path program 22 times [2021-03-10 22:04:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:49,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612825872] [2021-03-10 22:04:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612825872] [2021-03-10 22:04:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450971962] [2021-03-10 22:04:49,572 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:50,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:04:50,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109194314] [2021-03-10 22:04:50,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:04:50,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:04:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:50,043 INFO L87 Difference]: Start difference. First operand 416 states and 1312 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:50,409 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:04:50,543 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 22:04:50,692 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-10 22:04:51,021 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:04:51,202 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 22:04:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:51,289 INFO L93 Difference]: Finished difference Result 657 states and 1959 transitions. [2021-03-10 22:04:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:04:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 20 [2021-03-10 22:04:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:51,290 INFO L225 Difference]: With dead ends: 657 [2021-03-10 22:04:51,290 INFO L226 Difference]: Without dead ends: 627 [2021-03-10 22:04:51,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1506.5ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:04:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-03-10 22:04:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 419. [2021-03-10 22:04:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.165071770334928) internal successors, (1323), 418 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1323 transitions. [2021-03-10 22:04:51,296 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1323 transitions. Word has length 20 [2021-03-10 22:04:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:51,297 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1323 transitions. [2021-03-10 22:04:51,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1323 transitions. [2021-03-10 22:04:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:51,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:51,297 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:51,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:51,498 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1184790974, now seen corresponding path program 23 times [2021-03-10 22:04:51,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:51,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081090472] [2021-03-10 22:04:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081090472] [2021-03-10 22:04:51,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401443457] [2021-03-10 22:04:51,668 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:51,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:04:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:52,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:04:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370150446] [2021-03-10 22:04:52,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:04:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:04:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:52,156 INFO L87 Difference]: Start difference. First operand 419 states and 1323 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,777 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 22:04:52,927 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 22:04:53,063 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 22:04:53,300 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-03-10 22:04:53,414 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 22:04:53,560 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 22:04:53,745 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-10 22:04:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:53,961 INFO L93 Difference]: Finished difference Result 937 states and 2707 transitions. [2021-03-10 22:04:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:04:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:53,963 INFO L225 Difference]: With dead ends: 937 [2021-03-10 22:04:53,963 INFO L226 Difference]: Without dead ends: 877 [2021-03-10 22:04:53,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1973.0ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:04:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-03-10 22:04:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 482. [2021-03-10 22:04:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.1517671517671517) internal successors, (1516), 481 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1516 transitions. [2021-03-10 22:04:53,970 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1516 transitions. Word has length 20 [2021-03-10 22:04:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:53,970 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1516 transitions. [2021-03-10 22:04:53,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1516 transitions. [2021-03-10 22:04:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:53,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:53,971 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:54,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-03-10 22:04:54,174 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 24 times [2021-03-10 22:04:54,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:54,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414209850] [2021-03-10 22:04:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414209850] [2021-03-10 22:04:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516701282] [2021-03-10 22:04:54,363 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:04:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:54,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:54,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:54,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:54,710 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:54,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:54,722 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:54,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:54,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:54,739 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:54,756 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,761 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,767 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:54,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:54,777 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:54,783 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:54,788 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:54,793 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:54,807 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:54,812 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:54,818 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:54,823 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:55,100 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-03-10 22:04:55,100 INFO L628 ElimStorePlain]: treesize reduction 30, result has 90.9 percent of original size [2021-03-10 22:04:55,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:04:55,108 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:971, output treesize:300 [2021-03-10 22:04:55,402 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-10 22:04:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:56,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:56,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:56,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,349 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 22:04:56,349 INFO L628 ElimStorePlain]: treesize reduction 106, result has 57.4 percent of original size [2021-03-10 22:04:56,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:56,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:56,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:56,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:56,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:56,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:56,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:56,564 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:295, output treesize:131 [2021-03-10 22:04:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:56,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:04:56,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326579635] [2021-03-10 22:04:56,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:04:56,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:04:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:56,789 INFO L87 Difference]: Start difference. First operand 482 states and 1516 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,022 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 22:04:57,381 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-03-10 22:04:57,540 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 22:04:57,920 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-03-10 22:04:58,107 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:04:58,535 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2021-03-10 22:04:59,011 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2021-03-10 22:04:59,430 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-03-10 22:05:00,073 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2021-03-10 22:05:00,691 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-03-10 22:05:01,169 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-03-10 22:05:01,660 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2021-03-10 22:05:01,902 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 55 [2021-03-10 22:05:02,431 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2021-03-10 22:05:02,985 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 80 [2021-03-10 22:05:03,408 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 73 [2021-03-10 22:05:03,845 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 78 [2021-03-10 22:05:04,119 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 56 [2021-03-10 22:05:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,134 INFO L93 Difference]: Finished difference Result 1483 states and 4358 transitions. [2021-03-10 22:05:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:05:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,137 INFO L225 Difference]: With dead ends: 1483 [2021-03-10 22:05:04,137 INFO L226 Difference]: Without dead ends: 1318 [2021-03-10 22:05:04,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 7497.2ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:05:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-03-10 22:05:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 545. [2021-03-10 22:05:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.2775735294117645) internal successors, (1783), 544 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1783 transitions. [2021-03-10 22:05:04,147 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1783 transitions. Word has length 20 [2021-03-10 22:05:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,147 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 1783 transitions. [2021-03-10 22:05:04,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1783 transitions. [2021-03-10 22:05:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:04,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,148 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:04,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,349 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1831299158, now seen corresponding path program 25 times [2021-03-10 22:05:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020630042] [2021-03-10 22:05:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020630042] [2021-03-10 22:05:04,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004796937] [2021-03-10 22:05:04,542 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:05:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:04,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:04,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:04,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:04,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:04,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:04,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:04,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:04,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:04,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:04,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:04,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:04,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:04,983 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:04,989 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:04,994 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:04,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:04,999 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:05,005 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:05,010 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:05,014 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:05,018 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:05,022 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:05,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:05,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:05:05,122 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:721, output treesize:221 [2021-03-10 22:05:05,340 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-03-10 22:05:05,512 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:05:06,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:06,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:06,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:06,621 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 81 [2021-03-10 22:05:06,622 INFO L628 ElimStorePlain]: treesize reduction 241, result has 54.6 percent of original size [2021-03-10 22:05:06,622 INFO L518 ElimStorePlain]: Eliminatee v_prenex_14 vanished before elimination [2021-03-10 22:05:06,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:06,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:06,760 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:05:06,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:06,760 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-03-10 22:05:06,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:06,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:06,894 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:05:06,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:06,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2021-03-10 22:05:06,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-03-10 22:05:06,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:06,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,025 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:05:07,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-03-10 22:05:07,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-03-10 22:05:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,158 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:05:07,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,293 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:05:07,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:05:07,316 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 20 variables, input treesize:537, output treesize:239 [2021-03-10 22:05:07,521 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:05:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:07,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984189625] [2021-03-10 22:05:07,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:07,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:07,769 INFO L87 Difference]: Start difference. First operand 545 states and 1783 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,905 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2021-03-10 22:05:09,286 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2021-03-10 22:05:09,574 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-03-10 22:05:09,987 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 79 [2021-03-10 22:05:10,369 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-03-10 22:05:10,964 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2021-03-10 22:05:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:10,975 INFO L93 Difference]: Finished difference Result 1035 states and 3152 transitions. [2021-03-10 22:05:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:05:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:10,977 INFO L225 Difference]: With dead ends: 1035 [2021-03-10 22:05:10,977 INFO L226 Difference]: Without dead ends: 1020 [2021-03-10 22:05:10,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3700.5ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:05:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-03-10 22:05:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 542. [2021-03-10 22:05:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.2698706099815156) internal successors, (1769), 541 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1769 transitions. [2021-03-10 22:05:10,985 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1769 transitions. Word has length 20 [2021-03-10 22:05:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:10,986 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1769 transitions. [2021-03-10 22:05:10,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1769 transitions. [2021-03-10 22:05:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:10,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:10,986 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,194 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1845968800, now seen corresponding path program 26 times [2021-03-10 22:05:11,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020053216] [2021-03-10 22:05:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020053216] [2021-03-10 22:05:11,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117553606] [2021-03-10 22:05:11,481 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:11,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:05:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:11,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:11,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:11,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:11,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:11,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:11,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:11,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:11,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:11,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:11,963 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:11,968 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:11,973 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:11,981 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:11,987 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:11,992 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:11,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:11,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:11,997 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:12,002 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:12,008 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:12,013 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:12,018 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:12,023 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,162 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 22:05:12,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:12,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:05:12,166 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:769, output treesize:300 [2021-03-10 22:05:12,429 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-10 22:05:12,606 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:05:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:13,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:13,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:13,401 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-10 22:05:13,401 INFO L628 ElimStorePlain]: treesize reduction 98, result has 51.5 percent of original size [2021-03-10 22:05:13,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:13,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:13,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:13,445 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-03-10 22:05:13,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:13,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:13,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:13,488 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-03-10 22:05:13,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:05:13,489 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:210, output treesize:92 [2021-03-10 22:05:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253738172] [2021-03-10 22:05:13,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:13,606 INFO L87 Difference]: Start difference. First operand 542 states and 1769 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,414 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-03-10 22:05:14,654 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-03-10 22:05:14,997 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-03-10 22:05:15,311 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2021-03-10 22:05:15,673 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-03-10 22:05:15,818 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:05:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:15,835 INFO L93 Difference]: Finished difference Result 867 states and 2701 transitions. [2021-03-10 22:05:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:05:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:15,837 INFO L225 Difference]: With dead ends: 867 [2021-03-10 22:05:15,837 INFO L226 Difference]: Without dead ends: 837 [2021-03-10 22:05:15,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2807.1ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:05:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-03-10 22:05:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 542. [2021-03-10 22:05:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.2698706099815156) internal successors, (1769), 541 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1769 transitions. [2021-03-10 22:05:15,844 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1769 transitions. Word has length 20 [2021-03-10 22:05:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:15,844 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1769 transitions. [2021-03-10 22:05:15,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1769 transitions. [2021-03-10 22:05:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:15,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:15,845 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:16,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,060 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash 930887312, now seen corresponding path program 27 times [2021-03-10 22:05:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006003459] [2021-03-10 22:05:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006003459] [2021-03-10 22:05:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317825649] [2021-03-10 22:05:16,239 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:16,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:05:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:16,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:16,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:16,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:16,684 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:16,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:16,696 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:16,701 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:16,707 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:16,725 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:16,731 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:16,736 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:16,741 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:16,747 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:16,752 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,757 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:16,761 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,896 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 22:05:16,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:16,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:05:16,900 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:769, output treesize:300 [2021-03-10 22:05:17,148 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-10 22:05:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:17,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:17,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:17,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:18,045 INFO L628 ElimStorePlain]: treesize reduction 67, result has 58.9 percent of original size [2021-03-10 22:05:18,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:18,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:18,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:18,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:18,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:18,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:05:18,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:198, output treesize:86 [2021-03-10 22:05:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:18,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:18,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005022526] [2021-03-10 22:05:18,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:18,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:18,243 INFO L87 Difference]: Start difference. First operand 542 states and 1769 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,749 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-03-10 22:05:18,903 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-10 22:05:19,166 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-10 22:05:19,516 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-03-10 22:05:19,738 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-03-10 22:05:20,423 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-03-10 22:05:20,746 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-03-10 22:05:21,226 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-03-10 22:05:21,412 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 22:05:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:21,430 INFO L93 Difference]: Finished difference Result 1513 states and 4500 transitions. [2021-03-10 22:05:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:05:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:21,432 INFO L225 Difference]: With dead ends: 1513 [2021-03-10 22:05:21,433 INFO L226 Difference]: Without dead ends: 1453 [2021-03-10 22:05:21,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 3501.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:05:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-03-10 22:05:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 583. [2021-03-10 22:05:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.314432989690722) internal successors, (1929), 582 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1929 transitions. [2021-03-10 22:05:21,443 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1929 transitions. Word has length 20 [2021-03-10 22:05:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:21,443 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1929 transitions. [2021-03-10 22:05:21,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1929 transitions. [2021-03-10 22:05:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:21,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:21,444 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:21,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-03-10 22:05:21,658 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:21,658 INFO L82 PathProgramCache]: Analyzing trace with hash -998509850, now seen corresponding path program 28 times [2021-03-10 22:05:21,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:21,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509302546] [2021-03-10 22:05:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509302546] [2021-03-10 22:05:21,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149887547] [2021-03-10 22:05:21,897 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:21,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:21,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:05:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:22,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:22,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:22,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:22,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:22,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:22,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:22,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:22,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:22,377 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:22,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:22,388 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:22,393 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:22,399 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:22,404 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:22,410 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:22,415 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:22,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:22,420 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,560 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:05:22,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:22,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:05:22,564 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:281 [2021-03-10 22:05:22,729 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:05:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:23,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:23,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:23,850 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 87 [2021-03-10 22:05:23,851 INFO L628 ElimStorePlain]: treesize reduction 267, result has 48.9 percent of original size [2021-03-10 22:05:23,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:23,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:23,977 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:05:23,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:23,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:23,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,102 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:05:24,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 22:05:24,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:24,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,229 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:05:24,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,229 INFO L518 ElimStorePlain]: Eliminatee v_prenex_50 vanished before elimination [2021-03-10 22:05:24,229 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-03-10 22:05:24,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:24,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,355 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:05:24,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:24,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,476 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:05:24,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:24,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,594 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:05:24,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:24,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,710 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:05:24,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:24,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,829 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:05:24,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:05:24,832 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 18 variables, input treesize:561, output treesize:191 [2021-03-10 22:05:25,038 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 22:05:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:25,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684623570] [2021-03-10 22:05:25,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:25,276 INFO L87 Difference]: Start difference. First operand 583 states and 1929 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,507 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 22:05:26,810 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-03-10 22:05:27,080 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-10 22:05:27,426 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 22:05:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:27,751 INFO L93 Difference]: Finished difference Result 1337 states and 3985 transitions. [2021-03-10 22:05:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:05:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:27,754 INFO L225 Difference]: With dead ends: 1337 [2021-03-10 22:05:27,754 INFO L226 Difference]: Without dead ends: 1262 [2021-03-10 22:05:27,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2831.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:05:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-03-10 22:05:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 586. [2021-03-10 22:05:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.336752136752137) internal successors, (1952), 585 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1952 transitions. [2021-03-10 22:05:27,764 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1952 transitions. Word has length 20 [2021-03-10 22:05:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:27,764 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1952 transitions. [2021-03-10 22:05:27,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1952 transitions. [2021-03-10 22:05:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:27,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:27,765 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:27,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1536 [2021-03-10 22:05:27,979 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash 761543090, now seen corresponding path program 29 times [2021-03-10 22:05:27,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:27,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605574467] [2021-03-10 22:05:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605574467] [2021-03-10 22:05:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947208083] [2021-03-10 22:05:28,196 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:05:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:05:28,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967422940] [2021-03-10 22:05:28,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:05:28,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:05:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:28,732 INFO L87 Difference]: Start difference. First operand 586 states and 1952 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,473 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-03-10 22:05:30,063 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 22:05:30,383 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 22:05:30,567 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-10 22:05:30,955 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-10 22:05:31,167 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-10 22:05:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:31,369 INFO L93 Difference]: Finished difference Result 1281 states and 3876 transitions. [2021-03-10 22:05:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:05:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:31,372 INFO L225 Difference]: With dead ends: 1281 [2021-03-10 22:05:31,372 INFO L226 Difference]: Without dead ends: 1176 [2021-03-10 22:05:31,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2642.8ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:05:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-03-10 22:05:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 589. [2021-03-10 22:05:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.3537414965986394) internal successors, (1972), 588 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1972 transitions. [2021-03-10 22:05:31,381 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1972 transitions. Word has length 20 [2021-03-10 22:05:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:31,381 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1972 transitions. [2021-03-10 22:05:31,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1972 transitions. [2021-03-10 22:05:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:31,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:31,382 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:31,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1897 [2021-03-10 22:05:31,583 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1991665402, now seen corresponding path program 30 times [2021-03-10 22:05:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:31,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839882471] [2021-03-10 22:05:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839882471] [2021-03-10 22:05:31,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831832529] [2021-03-10 22:05:31,751 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:05:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:32,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:32,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:32,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:32,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:32,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:32,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:32,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:32,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:32,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:32,130 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:32,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:32,139 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:32,143 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:32,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 6 xjuncts. [2021-03-10 22:05:32,216 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:413, output treesize:163 [2021-03-10 22:05:32,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:32,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:32,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:33,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,107 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 22:05:33,108 INFO L628 ElimStorePlain]: treesize reduction 67, result has 60.1 percent of original size [2021-03-10 22:05:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:33,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:33,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,195 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-03-10 22:05:33,195 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-03-10 22:05:33,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:05:33,196 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:244, output treesize:92 [2021-03-10 22:05:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046755342] [2021-03-10 22:05:33,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:33,313 INFO L87 Difference]: Start difference. First operand 589 states and 1972 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,820 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 22:05:34,109 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 22:05:34,354 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2021-03-10 22:05:34,631 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-03-10 22:05:34,810 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 22:05:35,051 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-03-10 22:05:35,272 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-03-10 22:05:35,441 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-03-10 22:05:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:35,531 INFO L93 Difference]: Finished difference Result 1197 states and 3636 transitions. [2021-03-10 22:05:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:05:35,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:35,533 INFO L225 Difference]: With dead ends: 1197 [2021-03-10 22:05:35,533 INFO L226 Difference]: Without dead ends: 1094 [2021-03-10 22:05:35,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2513.4ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:05:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-03-10 22:05:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 678. [2021-03-10 22:05:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.4032496307237814) internal successors, (2304), 677 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2304 transitions. [2021-03-10 22:05:35,543 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2304 transitions. Word has length 20 [2021-03-10 22:05:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:35,543 INFO L480 AbstractCegarLoop]: Abstraction has 678 states and 2304 transitions. [2021-03-10 22:05:35,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2304 transitions. [2021-03-10 22:05:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:35,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:35,544 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:35,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1925 [2021-03-10 22:05:35,747 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash 48224212, now seen corresponding path program 31 times [2021-03-10 22:05:35,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:35,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555552763] [2021-03-10 22:05:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555552763] [2021-03-10 22:05:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781747930] [2021-03-10 22:05:35,966 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:05:36,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:36,543 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_59], 3=[v_prenex_61], 6=[ends_with_2, v_prenex_60, v_prenex_63]} [2021-03-10 22:05:36,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:36,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,097 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 112 [2021-03-10 22:05:37,097 INFO L628 ElimStorePlain]: treesize reduction 366, result has 60.1 percent of original size [2021-03-10 22:05:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:37,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:37,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,363 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 22:05:37,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:37,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,603 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:05:37,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:37,609 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:37,614 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,831 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-03-10 22:05:37,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:37,843 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:37,848 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:38,055 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:05:38,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:38,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: 10 dim-0 vars, and 13 xjuncts. [2021-03-10 22:05:38,067 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 8 variables, input treesize:920, output treesize:492 [2021-03-10 22:05:38,345 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 121 [2021-03-10 22:05:38,704 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 108 [2021-03-10 22:05:38,918 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:05:41,111 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_79, v_prenex_77, v_prenex_78, ends_with_10, v_prenex_72, v_prenex_94, v_prenex_91, v_prenex_92, v_prenex_97, v_prenex_75, v_prenex_98, v_prenex_76, v_prenex_73, v_prenex_96, v_prenex_74, v_prenex_100, v_prenex_102, v_prenex_104, v_prenex_105, ends_with_6, v_prenex_82, v_prenex_83, v_prenex_80, v_prenex_109, v_prenex_81, v_prenex_84, v_prenex_85, v_prenex_114], 15=[v_prenex_87], 21=[v_prenex_88]} [2021-03-10 22:05:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:41,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:41,638 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 117 [2021-03-10 22:05:41,639 INFO L628 ElimStorePlain]: treesize reduction 1029, result has 25.1 percent of original size [2021-03-10 22:05:41,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-03-10 22:05:41,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-03-10 22:05:41,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:41,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:41,794 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-10 22:05:41,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:41,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_72 vanished before elimination [2021-03-10 22:05:41,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-03-10 22:05:41,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:41,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:41,947 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:05:41,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:41,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:41,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,105 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:05:42,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:42,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,256 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 22:05:42,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,256 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-03-10 22:05:42,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:42,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,403 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 22:05:42,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_100 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_102 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-03-10 22:05:42,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-03-10 22:05:42,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:42,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,549 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:05:42,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:42,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,689 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-03-10 22:05:42,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:42,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,826 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:05:42,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-03-10 22:05:42,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-03-10 22:05:42,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_81 vanished before elimination [2021-03-10 22:05:42,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:42,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,964 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:05:42,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:42,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-03-10 22:05:42,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-03-10 22:05:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:42,970 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:42,976 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:42,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:42,982 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:43,108 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:05:43,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:43,114 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:43,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:43,119 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:43,125 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:43,245 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:05:43,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:43,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 24 dim-0 vars, 30 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-10 22:05:43,250 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 54 variables, input treesize:1381, output treesize:220 [2021-03-10 22:05:43,423 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 22:05:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395275954] [2021-03-10 22:05:43,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:43,610 INFO L87 Difference]: Start difference. First operand 678 states and 2304 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,959 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-03-10 22:05:44,270 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 127 [2021-03-10 22:05:44,804 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 139 [2021-03-10 22:05:45,356 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 138 [2021-03-10 22:05:45,913 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2021-03-10 22:05:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:45,920 INFO L93 Difference]: Finished difference Result 922 states and 3014 transitions. [2021-03-10 22:05:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:45,922 INFO L225 Difference]: With dead ends: 922 [2021-03-10 22:05:45,922 INFO L226 Difference]: Without dead ends: 907 [2021-03-10 22:05:45,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3215.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:05:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-03-10 22:05:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 693. [2021-03-10 22:05:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.407514450867052) internal successors, (2358), 692 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2358 transitions. [2021-03-10 22:05:45,931 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2358 transitions. Word has length 20 [2021-03-10 22:05:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 2358 transitions. [2021-03-10 22:05:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2358 transitions. [2021-03-10 22:05:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:45,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:45,932 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:46,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2095,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,133 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1542827176, now seen corresponding path program 32 times [2021-03-10 22:05:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:46,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30016354] [2021-03-10 22:05:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30016354] [2021-03-10 22:05:46,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103871293] [2021-03-10 22:05:46,346 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:05:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:46,566 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:05:46,861 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_119], 21=[ends_with_2]} [2021-03-10 22:05:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:46,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:46,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:46,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:46,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:46,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:46,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:46,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,359 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 99 [2021-03-10 22:05:47,359 INFO L628 ElimStorePlain]: treesize reduction 448, result has 49.5 percent of original size [2021-03-10 22:05:47,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:47,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:47,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:47,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:47,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:47,386 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:47,392 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:47,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:47,402 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,585 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:05:47,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:47,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:05:47,595 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:995, output treesize:401 [2021-03-10 22:05:47,883 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 125 [2021-03-10 22:05:48,138 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-03-10 22:05:49,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:49,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:49,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:49,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:49,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:49,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:49,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:49,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,251 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-03-10 22:05:49,251 INFO L628 ElimStorePlain]: treesize reduction 526, result has 21.1 percent of original size [2021-03-10 22:05:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:49,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:49,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:49,374 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:49,431 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:49,488 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:49,542 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:49,594 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:49,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:49,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:05:49,642 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:852, output treesize:99 [2021-03-10 22:05:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:49,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350414777] [2021-03-10 22:05:49,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:49,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:49,784 INFO L87 Difference]: Start difference. First operand 693 states and 2358 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,190 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-03-10 22:05:50,479 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 101 [2021-03-10 22:05:50,821 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 137 [2021-03-10 22:05:51,220 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2021-03-10 22:05:51,626 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 112 [2021-03-10 22:05:52,105 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 139 [2021-03-10 22:05:52,586 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 85 [2021-03-10 22:05:53,135 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 113 [2021-03-10 22:05:53,448 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 22:05:53,801 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 115 [2021-03-10 22:05:54,156 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 115 [2021-03-10 22:05:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:54,239 INFO L93 Difference]: Finished difference Result 1164 states and 3710 transitions. [2021-03-10 22:05:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:05:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:54,242 INFO L225 Difference]: With dead ends: 1164 [2021-03-10 22:05:54,242 INFO L226 Difference]: Without dead ends: 1119 [2021-03-10 22:05:54,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 5087.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:05:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-03-10 22:05:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 690. [2021-03-10 22:05:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.404934687953556) internal successors, (2346), 689 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2346 transitions. [2021-03-10 22:05:54,269 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2346 transitions. Word has length 20 [2021-03-10 22:05:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:54,270 INFO L480 AbstractCegarLoop]: Abstraction has 690 states and 2346 transitions. [2021-03-10 22:05:54,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2346 transitions. [2021-03-10 22:05:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:54,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:54,271 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2394,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,485 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1461428120, now seen corresponding path program 33 times [2021-03-10 22:05:54,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220510618] [2021-03-10 22:05:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220510618] [2021-03-10 22:05:54,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757379057] [2021-03-10 22:05:54,685 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:05:54,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:55,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:05:55,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:05:55,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:55,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:05:55,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,750 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2021-03-10 22:05:55,751 INFO L628 ElimStorePlain]: treesize reduction 326, result has 51.4 percent of original size [2021-03-10 22:05:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:55,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:55,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,922 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:05:55,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:55,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:55,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:55,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,087 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:05:56,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:56,093 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:56,098 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,247 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:05:56,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-03-10 22:05:56,257 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:789, output treesize:321 [2021-03-10 22:05:56,416 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 22:05:56,741 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 85 [2021-03-10 22:05:57,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:57,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:57,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:57,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:57,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:05:57,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:57,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,459 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-03-10 22:05:57,459 INFO L628 ElimStorePlain]: treesize reduction 413, result has 26.4 percent of original size [2021-03-10 22:05:57,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:57,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:57,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:57,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:57,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:57,700 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:57,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:57,806 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:57,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:57,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:05:57,854 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:690, output treesize:99 [2021-03-10 22:05:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:57,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:05:57,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196333141] [2021-03-10 22:05:57,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:05:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:05:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:57,998 INFO L87 Difference]: Start difference. First operand 690 states and 2346 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,681 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 113 [2021-03-10 22:05:58,982 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2021-03-10 22:05:59,148 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-10 22:05:59,447 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 79 [2021-03-10 22:05:59,964 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 119 [2021-03-10 22:06:00,514 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 130 [2021-03-10 22:06:00,930 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 148 [2021-03-10 22:06:01,249 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 139 [2021-03-10 22:06:01,608 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 95 [2021-03-10 22:06:01,900 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 86 [2021-03-10 22:06:02,599 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2021-03-10 22:06:03,239 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 125 [2021-03-10 22:06:03,852 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147 [2021-03-10 22:06:04,212 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 91 [2021-03-10 22:06:04,817 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 132 [2021-03-10 22:06:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:04,917 INFO L93 Difference]: Finished difference Result 1206 states and 3822 transitions. [2021-03-10 22:06:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:06:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:04,919 INFO L225 Difference]: With dead ends: 1206 [2021-03-10 22:06:04,919 INFO L226 Difference]: Without dead ends: 1161 [2021-03-10 22:06:04,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 7236.2ms TimeCoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:06:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-03-10 22:06:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 684. [2021-03-10 22:06:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.3997071742313323) internal successors, (2322), 683 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2322 transitions. [2021-03-10 22:06:04,929 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2322 transitions. Word has length 20 [2021-03-10 22:06:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:04,929 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 2322 transitions. [2021-03-10 22:06:04,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2322 transitions. [2021-03-10 22:06:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:04,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:04,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:05,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2679 [2021-03-10 22:06:05,130 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 34 times [2021-03-10 22:06:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796862568] [2021-03-10 22:06:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:05,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796862568] [2021-03-10 22:06:05,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599819567] [2021-03-10 22:06:05,364 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:05,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:06:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:05,862 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2, v_prenex_153], 10=[v_prenex_155]} [2021-03-10 22:06:05,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:05,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:05,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:05,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:05,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:05,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:05,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:05,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:05,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:05,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,165 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-03-10 22:06:06,165 INFO L628 ElimStorePlain]: treesize reduction 256, result has 50.1 percent of original size [2021-03-10 22:06:06,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:06,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:06,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,289 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:06:06,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:06,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:06,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,412 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 22:06:06,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:06,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-03-10 22:06:06,418 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 7 variables, input treesize:585, output treesize:239 [2021-03-10 22:06:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:07,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:07,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:07,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:07,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:07,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:07,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,732 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 97 [2021-03-10 22:06:07,732 INFO L628 ElimStorePlain]: treesize reduction 987, result has 19.1 percent of original size [2021-03-10 22:06:07,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:07,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,841 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:06:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:07,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,951 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:06:07,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:07,958 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,058 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:06:08,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:08,064 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:08,169 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:08,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:08,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:08,470 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:08,566 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:08,665 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:08,756 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:06:08,844 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1413, output treesize:156 [2021-03-10 22:06:08,997 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:06:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:09,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:09,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36100073] [2021-03-10 22:06:09,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:09,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:09,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:09,169 INFO L87 Difference]: Start difference. First operand 684 states and 2322 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,497 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-10 22:06:09,698 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-03-10 22:06:09,851 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2021-03-10 22:06:10,027 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-10 22:06:10,204 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-03-10 22:06:10,456 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-03-10 22:06:10,644 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-03-10 22:06:10,831 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-03-10 22:06:11,279 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-10 22:06:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:11,331 INFO L93 Difference]: Finished difference Result 968 states and 3114 transitions. [2021-03-10 22:06:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:06:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:11,333 INFO L225 Difference]: With dead ends: 968 [2021-03-10 22:06:11,333 INFO L226 Difference]: Without dead ends: 923 [2021-03-10 22:06:11,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2562.8ms TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:06:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-03-10 22:06:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 691. [2021-03-10 22:06:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.3956521739130436) internal successors, (2343), 690 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2343 transitions. [2021-03-10 22:06:11,341 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2343 transitions. Word has length 20 [2021-03-10 22:06:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:11,341 INFO L480 AbstractCegarLoop]: Abstraction has 691 states and 2343 transitions. [2021-03-10 22:06:11,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2343 transitions. [2021-03-10 22:06:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:11,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:11,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2952 [2021-03-10 22:06:11,547 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 35 times [2021-03-10 22:06:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040745847] [2021-03-10 22:06:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040745847] [2021-03-10 22:06:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384764887] [2021-03-10 22:06:11,839 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:06:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:12,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:06:12,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712491001] [2021-03-10 22:06:12,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:06:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:06:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:12,366 INFO L87 Difference]: Start difference. First operand 691 states and 2343 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,963 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-10 22:06:13,272 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 22:06:13,452 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 22:06:13,648 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 22:06:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:13,688 INFO L93 Difference]: Finished difference Result 885 states and 2857 transitions. [2021-03-10 22:06:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:13,689 INFO L225 Difference]: With dead ends: 885 [2021-03-10 22:06:13,689 INFO L226 Difference]: Without dead ends: 825 [2021-03-10 22:06:13,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1631.3ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:06:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-03-10 22:06:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 702. [2021-03-10 22:06:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.3937232524964336) internal successors, (2379), 701 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2379 transitions. [2021-03-10 22:06:13,697 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2379 transitions. Word has length 20 [2021-03-10 22:06:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:13,697 INFO L480 AbstractCegarLoop]: Abstraction has 702 states and 2379 transitions. [2021-03-10 22:06:13,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2379 transitions. [2021-03-10 22:06:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:13,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:13,699 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:13,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:13,911 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 725260138, now seen corresponding path program 36 times [2021-03-10 22:06:13,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:13,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247137952] [2021-03-10 22:06:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247137952] [2021-03-10 22:06:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355210877] [2021-03-10 22:06:14,189 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:14,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:06:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:14,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:14,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:14,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:14,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,381 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2021-03-10 22:06:15,382 INFO L628 ElimStorePlain]: treesize reduction 352, result has 52.5 percent of original size [2021-03-10 22:06:15,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:15,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:15,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,594 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:06:15,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:15,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:15,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,796 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:06:15,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:15,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:15,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,000 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-10 22:06:16,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:16,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-03-10 22:06:16,023 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:869, output treesize:361 [2021-03-10 22:06:16,221 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 22:06:16,597 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 89 [2021-03-10 22:06:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:17,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:17,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:17,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:17,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:17,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:17,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:17,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:17,987 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 95 [2021-03-10 22:06:17,987 INFO L628 ElimStorePlain]: treesize reduction 1025, result has 18.2 percent of original size [2021-03-10 22:06:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:17,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,098 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:06:18,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_188 vanished before elimination [2021-03-10 22:06:18,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:18,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-10 22:06:18,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,214 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-03-10 22:06:18,214 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-03-10 22:06:18,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,321 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:06:18,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,327 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,431 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_203 vanished before elimination [2021-03-10 22:06:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:18,533 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,629 INFO L518 ElimStorePlain]: Eliminatee v_prenex_204 vanished before elimination [2021-03-10 22:06:18,629 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-03-10 22:06:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-03-10 22:06:18,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_192 vanished before elimination [2021-03-10 22:06:18,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-03-10 22:06:18,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:18,735 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-03-10 22:06:18,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-03-10 22:06:18,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_197 vanished before elimination [2021-03-10 22:06:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,832 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:18,926 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:19,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:19,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 24 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:06:19,106 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 34 variables, input treesize:1413, output treesize:156 [2021-03-10 22:06:19,262 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:06:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:19,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:19,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300321015] [2021-03-10 22:06:19,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:19,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:19,443 INFO L87 Difference]: Start difference. First operand 702 states and 2379 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,371 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-10 22:06:20,778 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 105 [2021-03-10 22:06:21,308 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-10 22:06:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:21,365 INFO L93 Difference]: Finished difference Result 1062 states and 3378 transitions. [2021-03-10 22:06:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:06:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:21,367 INFO L225 Difference]: With dead ends: 1062 [2021-03-10 22:06:21,367 INFO L226 Difference]: Without dead ends: 1017 [2021-03-10 22:06:21,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2577.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:06:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-03-10 22:06:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 706. [2021-03-10 22:06:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.3943262411347517) internal successors, (2393), 705 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2393 transitions. [2021-03-10 22:06:21,376 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2393 transitions. Word has length 20 [2021-03-10 22:06:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 2393 transitions. [2021-03-10 22:06:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2393 transitions. [2021-03-10 22:06:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:21,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:21,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:21,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,583 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1910342118, now seen corresponding path program 37 times [2021-03-10 22:06:21,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:21,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15262945] [2021-03-10 22:06:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15262945] [2021-03-10 22:06:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272680967] [2021-03-10 22:06:21,865 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:06:21,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:22,065 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 22:06:22,519 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_211], 1=[v_prenex_212, v_prenex_213], 6=[ends_with_2, v_prenex_214, v_prenex_215]} [2021-03-10 22:06:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:22,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,204 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 114 [2021-03-10 22:06:23,205 INFO L628 ElimStorePlain]: treesize reduction 453, result has 57.5 percent of original size [2021-03-10 22:06:23,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:23,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:23,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:23,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,515 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:06:23,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:23,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:23,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,808 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 22:06:23,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:23,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:23,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:23,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,101 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:06:24,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:24,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:24,113 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:24,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,419 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:06:24,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:24,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:24,431 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:24,436 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,701 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:06:24,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: 10 dim-0 vars, and 13 xjuncts. [2021-03-10 22:06:24,714 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 9 variables, input treesize:1068, output treesize:557 [2021-03-10 22:06:25,066 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 125 [2021-03-10 22:06:27,092 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_239, v_prenex_265, v_prenex_243, v_prenex_242, v_prenex_267, v_prenex_245, v_prenex_244, v_prenex_225, v_prenex_246, v_prenex_224, v_prenex_268, v_prenex_249, v_prenex_248, v_prenex_226, v_prenex_261, v_prenex_241, v_prenex_262, v_prenex_229, v_prenex_228, v_prenex_276, v_prenex_231, v_prenex_234, v_prenex_235, v_prenex_237, v_prenex_270, v_prenex_272, v_prenex_274, v_prenex_230], 15=[ends_with_10, v_prenex_252], 21=[v_prenex_255, ends_with_6]} [2021-03-10 22:06:27,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:27,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:27,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,674 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 143 [2021-03-10 22:06:27,675 INFO L628 ElimStorePlain]: treesize reduction 1233, result has 26.6 percent of original size [2021-03-10 22:06:27,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_265 vanished before elimination [2021-03-10 22:06:27,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_243 vanished before elimination [2021-03-10 22:06:27,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:27,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,890 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 22:06:27,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:27,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:27,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:28,102 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-10 22:06:28,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_245 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_225 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_224 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-03-10 22:06:28,103 INFO L518 ElimStorePlain]: Eliminatee v_prenex_248 vanished before elimination [2021-03-10 22:06:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:28,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:28,315 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-10 22:06:28,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:28,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-03-10 22:06:28,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:28,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:28,522 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 22:06:28,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:28,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-03-10 22:06:28,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-03-10 22:06:28,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_228 vanished before elimination [2021-03-10 22:06:28,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_276 vanished before elimination [2021-03-10 22:06:28,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:28,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:28,723 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 22:06:28,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:28,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_234 vanished before elimination [2021-03-10 22:06:28,723 INFO L518 ElimStorePlain]: Eliminatee v_prenex_235 vanished before elimination [2021-03-10 22:06:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:28,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:28,923 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-10 22:06:28,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:28,924 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-03-10 22:06:28,924 INFO L518 ElimStorePlain]: Eliminatee v_prenex_272 vanished before elimination [2021-03-10 22:06:28,924 INFO L518 ElimStorePlain]: Eliminatee v_prenex_274 vanished before elimination [2021-03-10 22:06:28,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:28,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,122 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 22:06:29,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,130 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,324 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 22:06:29,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,332 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,349 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,355 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,535 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-10 22:06:29,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,563 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,569 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,575 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,747 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:06:29,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,754 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,760 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,927 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-10 22:06:29,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 32 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:06:29,932 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 64 variables, input treesize:1687, output treesize:290 [2021-03-10 22:06:30,144 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:06:30,333 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 22:06:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:30,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:30,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286529514] [2021-03-10 22:06:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:30,533 INFO L87 Difference]: Start difference. First operand 706 states and 2393 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,150 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2021-03-10 22:06:31,321 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-03-10 22:06:31,476 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-03-10 22:06:31,881 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-03-10 22:06:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:31,924 INFO L93 Difference]: Finished difference Result 962 states and 3114 transitions. [2021-03-10 22:06:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:06:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:31,926 INFO L225 Difference]: With dead ends: 962 [2021-03-10 22:06:31,926 INFO L226 Difference]: Without dead ends: 947 [2021-03-10 22:06:31,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2237.1ms TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:06:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-03-10 22:06:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 707. [2021-03-10 22:06:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.396600566572238) internal successors, (2398), 706 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2398 transitions. [2021-03-10 22:06:31,935 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2398 transitions. Word has length 20 [2021-03-10 22:06:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:31,935 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2398 transitions. [2021-03-10 22:06:31,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2398 transitions. [2021-03-10 22:06:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:31,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:31,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:32,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,136 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash 969993726, now seen corresponding path program 38 times [2021-03-10 22:06:32,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:32,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007897498] [2021-03-10 22:06:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007897498] [2021-03-10 22:06:32,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499718466] [2021-03-10 22:06:32,370 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:06:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:32,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:32,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:32,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:32,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:32,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:32,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:32,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:32,718 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,724 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:32,743 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:32,748 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:32,754 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:32,760 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:32,766 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:32,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:32,776 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:32,782 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,788 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:32,793 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,798 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:32,804 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:32,810 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:32,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:32,815 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,176 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 22:06:33,176 INFO L628 ElimStorePlain]: treesize reduction 37, result has 90.4 percent of original size [2021-03-10 22:06:33,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:06:33,180 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1096, output treesize:350 [2021-03-10 22:06:33,506 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-03-10 22:06:34,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:34,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:34,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:34,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:34,325 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:06:34,326 INFO L628 ElimStorePlain]: treesize reduction 125, result has 52.5 percent of original size [2021-03-10 22:06:34,326 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-03-10 22:06:34,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:34,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:34,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:34,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:34,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:34,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:34,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:34,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:34,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:34,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-03-10 22:06:34,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:06:34,531 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:279, output treesize:126 [2021-03-10 22:06:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:34,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:34,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108601457] [2021-03-10 22:06:34,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:34,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:34,751 INFO L87 Difference]: Start difference. First operand 707 states and 2398 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,407 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-03-10 22:06:35,732 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:06:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:35,770 INFO L93 Difference]: Finished difference Result 864 states and 2797 transitions. [2021-03-10 22:06:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:35,772 INFO L225 Difference]: With dead ends: 864 [2021-03-10 22:06:35,772 INFO L226 Difference]: Without dead ends: 819 [2021-03-10 22:06:35,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1639.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-03-10 22:06:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 709. [2021-03-10 22:06:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.402542372881356) internal successors, (2409), 708 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2409 transitions. [2021-03-10 22:06:35,780 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2409 transitions. Word has length 20 [2021-03-10 22:06:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:35,780 INFO L480 AbstractCegarLoop]: Abstraction has 709 states and 2409 transitions. [2021-03-10 22:06:35,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2409 transitions. [2021-03-10 22:06:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:35,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:35,781 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:35,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:35,981 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1980452154, now seen corresponding path program 39 times [2021-03-10 22:06:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:35,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277842117] [2021-03-10 22:06:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277842117] [2021-03-10 22:06:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520683158] [2021-03-10 22:06:36,231 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:06:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:36,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,332 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2021-03-10 22:06:37,332 INFO L628 ElimStorePlain]: treesize reduction 285, result has 58.6 percent of original size [2021-03-10 22:06:37,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-03-10 22:06:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,533 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:06:37,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:37,534 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-03-10 22:06:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:37,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,726 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:06:37,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:37,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:37,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,919 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:06:37,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:37,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:06:37,924 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:695, output treesize:381 [2021-03-10 22:06:38,247 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-03-10 22:06:39,886 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_294, v_prenex_296], 1=[v_prenex_297, v_prenex_300, v_prenex_304, v_prenex_295], 6=[ends_with_2, ends_with_6, v_prenex_306, v_prenex_305, v_prenex_308, v_prenex_307, v_prenex_309, v_prenex_298, v_prenex_311, v_prenex_310, v_prenex_299, v_prenex_302, v_prenex_301, v_prenex_303]} [2021-03-10 22:06:39,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:39,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,859 WARN L205 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 155 [2021-03-10 22:06:40,860 INFO L628 ElimStorePlain]: treesize reduction 1640, result has 26.0 percent of original size [2021-03-10 22:06:40,860 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-03-10 22:06:40,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:40,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:41,155 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-03-10 22:06:41,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:41,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:41,443 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-03-10 22:06:41,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:41,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:41,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:41,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:41,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:41,735 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-03-10 22:06:41,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:41,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-03-10 22:06:41,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:41,743 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:41,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,023 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 22:06:42,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:42,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:42,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,309 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 22:06:42,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:42,316 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,588 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-03-10 22:06:42,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:42,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:42,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:42,609 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,868 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-10 22:06:42,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:42,876 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:43,135 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 22:06:43,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:43,148 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:43,406 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 22:06:43,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:43,414 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:43,666 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 22:06:43,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:43,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:43,673 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:43,927 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 22:06:43,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:43,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:43,934 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,183 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 22:06:44,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:44,190 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,434 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-10 22:06:44,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:44,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:44,440 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,682 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:06:44,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:44,689 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:44,695 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,932 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:06:44,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:44,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:44,939 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:44,944 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,183 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:06:45,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:45,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:45,189 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:45,195 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,421 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:06:45,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:45,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 20 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-10 22:06:45,426 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 25 variables, input treesize:2219, output treesize:393 [2021-03-10 22:06:45,701 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-03-10 22:06:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:46,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:46,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917808898] [2021-03-10 22:06:46,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:46,013 INFO L87 Difference]: Start difference. First operand 709 states and 2409 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:46,640 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-03-10 22:06:46,853 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-03-10 22:06:47,148 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 22:06:47,421 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-10 22:06:47,673 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-03-10 22:06:48,066 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-03-10 22:06:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:48,104 INFO L93 Difference]: Finished difference Result 923 states and 2967 transitions. [2021-03-10 22:06:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:48,105 INFO L225 Difference]: With dead ends: 923 [2021-03-10 22:06:48,105 INFO L226 Difference]: Without dead ends: 863 [2021-03-10 22:06:48,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3032.7ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-03-10 22:06:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 714. [2021-03-10 22:06:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.41234221598878) internal successors, (2433), 713 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2433 transitions. [2021-03-10 22:06:48,114 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2433 transitions. Word has length 20 [2021-03-10 22:06:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:48,114 INFO L480 AbstractCegarLoop]: Abstraction has 714 states and 2433 transitions. [2021-03-10 22:06:48,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2433 transitions. [2021-03-10 22:06:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:48,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:48,115 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:48,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,315 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -976720680, now seen corresponding path program 40 times [2021-03-10 22:06:48,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:48,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306634358] [2021-03-10 22:06:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306634358] [2021-03-10 22:06:48,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295421822] [2021-03-10 22:06:48,567 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:06:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:48,814 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 22:06:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:49,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:49,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:49,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:49,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,640 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 116 [2021-03-10 22:06:49,641 INFO L628 ElimStorePlain]: treesize reduction 354, result has 52.2 percent of original size [2021-03-10 22:06:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:49,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:49,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,851 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 22:06:49,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:49,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:49,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:49,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,051 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:06:50,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:50,058 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:50,063 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,249 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 22:06:50,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:50,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-03-10 22:06:50,259 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 13 variables, input treesize:869, output treesize:361 [2021-03-10 22:06:50,453 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 22:06:50,761 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2021-03-10 22:06:52,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:52,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:52,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:52,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:52,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:52,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:52,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:52,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:52,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:52,779 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 98 [2021-03-10 22:06:52,779 INFO L628 ElimStorePlain]: treesize reduction 1081, result has 18.2 percent of original size [2021-03-10 22:06:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:52,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:52,901 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:06:52,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:52,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:52,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,021 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:06:53,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,138 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:06:53,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:53,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,254 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:06:53,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,254 INFO L518 ElimStorePlain]: Eliminatee v_prenex_349 vanished before elimination [2021-03-10 22:06:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,260 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,367 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:06:53,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,373 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,477 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:06:53,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_331 vanished before elimination [2021-03-10 22:06:53,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_342 vanished before elimination [2021-03-10 22:06:53,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_341 vanished before elimination [2021-03-10 22:06:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:53,483 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,587 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:06:53,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:53,592 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,698 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:06:53,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,699 INFO L518 ElimStorePlain]: Eliminatee v_prenex_333 vanished before elimination [2021-03-10 22:06:53,699 INFO L518 ElimStorePlain]: Eliminatee v_prenex_332 vanished before elimination [2021-03-10 22:06:53,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,704 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,804 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:06:53,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_346 vanished before elimination [2021-03-10 22:06:53,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-03-10 22:06:53,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_345 vanished before elimination [2021-03-10 22:06:53,805 INFO L518 ElimStorePlain]: Eliminatee v_prenex_334 vanished before elimination [2021-03-10 22:06:53,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:53,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_348 vanished before elimination [2021-03-10 22:06:53,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_336 vanished before elimination [2021-03-10 22:06:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:54,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 24 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:06:54,012 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 34 variables, input treesize:1473, output treesize:160 [2021-03-10 22:06:54,190 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:06:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:54,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:54,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:06:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849153798] [2021-03-10 22:06:54,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:54,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:54,342 INFO L87 Difference]: Start difference. First operand 714 states and 2433 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,116 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2021-03-10 22:06:55,707 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 22:06:55,943 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 22:06:56,243 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-03-10 22:06:56,430 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 22:06:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:56,458 INFO L93 Difference]: Finished difference Result 1079 states and 3468 transitions. [2021-03-10 22:06:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:06:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:56,460 INFO L225 Difference]: With dead ends: 1079 [2021-03-10 22:06:56,460 INFO L226 Difference]: Without dead ends: 1019 [2021-03-10 22:06:56,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2649.9ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:06:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-03-10 22:06:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 728. [2021-03-10 22:06:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.4181568088033014) internal successors, (2485), 727 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2485 transitions. [2021-03-10 22:06:56,469 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2485 transitions. Word has length 20 [2021-03-10 22:06:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:56,469 INFO L480 AbstractCegarLoop]: Abstraction has 728 states and 2485 transitions. [2021-03-10 22:06:56,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2485 transitions. [2021-03-10 22:06:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:56,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:56,471 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:56,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4833 [2021-03-10 22:06:56,671 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash 208361300, now seen corresponding path program 41 times [2021-03-10 22:06:56,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:56,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065982623] [2021-03-10 22:06:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065982623] [2021-03-10 22:06:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726179504] [2021-03-10 22:06:56,901 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:56,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:56,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:56,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:06:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:57,225 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:06:57,426 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:06:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:57,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:57,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:06:57,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850472462] [2021-03-10 22:06:57,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:06:57,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:57,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:06:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:57,604 INFO L87 Difference]: Start difference. First operand 728 states and 2485 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:58,124 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 22:06:58,522 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 22:06:58,706 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 22:06:58,846 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-03-10 22:06:59,135 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 22:06:59,327 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-03-10 22:06:59,479 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-03-10 22:06:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:59,493 INFO L93 Difference]: Finished difference Result 1075 states and 3483 transitions. [2021-03-10 22:06:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:06:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:59,495 INFO L225 Difference]: With dead ends: 1075 [2021-03-10 22:06:59,495 INFO L226 Difference]: Without dead ends: 1000 [2021-03-10 22:06:59,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2263.1ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:06:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-03-10 22:06:59,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 719. [2021-03-10 22:06:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.4192200557103063) internal successors, (2455), 718 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2455 transitions. [2021-03-10 22:06:59,503 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2455 transitions. Word has length 20 [2021-03-10 22:06:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:59,503 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2455 transitions. [2021-03-10 22:06:59,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2455 transitions. [2021-03-10 22:06:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:59,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:59,505 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:59,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5237,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:59,705 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash -640261172, now seen corresponding path program 42 times [2021-03-10 22:06:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:59,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710014311] [2021-03-10 22:06:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:59,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710014311] [2021-03-10 22:06:59,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847494247] [2021-03-10 22:06:59,964 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:00,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:07:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:07:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:00,404 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_357], 21=[ends_with_2]} [2021-03-10 22:07:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:00,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:00,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:07:00,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:00,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,983 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2021-03-10 22:07:00,984 INFO L628 ElimStorePlain]: treesize reduction 462, result has 50.2 percent of original size [2021-03-10 22:07:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:00,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:00,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:01,002 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:01,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:01,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:01,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:01,026 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:01,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:01,253 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:07:01,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:01,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:07:01,264 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:1041, output treesize:427 [2021-03-10 22:07:01,624 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2021-03-10 22:07:03,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:03,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:03,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:03,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:03,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:03,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:03,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:03,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:03,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,350 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 143 [2021-03-10 22:07:04,350 INFO L628 ElimStorePlain]: treesize reduction 1268, result has 23.2 percent of original size [2021-03-10 22:07:04,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:04,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,551 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-03-10 22:07:04,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:04,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:04,559 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,752 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-10 22:07:04,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:04,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:04,761 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,956 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-10 22:07:04,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:04,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:05,151 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-10 22:07:05,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:05,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:05,342 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 22:07:05,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:05,349 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:05,530 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 22:07:05,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:05,538 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:05,716 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 22:07:05,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:05,723 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:05,900 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 22:07:05,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:05,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:05,907 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,084 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 22:07:06,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:06,091 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,264 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 22:07:06,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:06,271 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,446 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:07:06,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:06,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,617 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-10 22:07:06,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:06,624 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,785 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 22:07:06,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:06,792 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,953 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 22:07:06,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:06,960 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:07,118 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-10 22:07:07,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:07,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:07:07,122 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 25 variables, input treesize:1825, output treesize:239 [2021-03-10 22:07:07,270 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:07:07,474 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-03-10 22:07:07,616 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:07:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:07,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:07,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:07:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490824272] [2021-03-10 22:07:07,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:07,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:07,687 INFO L87 Difference]: Start difference. First operand 719 states and 2455 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,445 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-03-10 22:07:08,772 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-03-10 22:07:09,164 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-03-10 22:07:09,408 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-03-10 22:07:09,744 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 50 [2021-03-10 22:07:10,066 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-03-10 22:07:10,384 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2021-03-10 22:07:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:10,397 INFO L93 Difference]: Finished difference Result 1192 states and 3719 transitions. [2021-03-10 22:07:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:07:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:10,399 INFO L225 Difference]: With dead ends: 1192 [2021-03-10 22:07:10,399 INFO L226 Difference]: Without dead ends: 1087 [2021-03-10 22:07:10,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3307.3ms TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:07:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-03-10 22:07:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 741. [2021-03-10 22:07:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.443243243243243) internal successors, (2548), 740 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2548 transitions. [2021-03-10 22:07:10,408 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2548 transitions. Word has length 20 [2021-03-10 22:07:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:10,409 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 2548 transitions. [2021-03-10 22:07:10,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2548 transitions. [2021-03-10 22:07:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:10,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:10,414 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:10,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5269,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:10,621 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:10,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1598197366, now seen corresponding path program 43 times [2021-03-10 22:07:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:10,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737965539] [2021-03-10 22:07:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:10,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737965539] [2021-03-10 22:07:10,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152002587] [2021-03-10 22:07:10,856 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:07:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:11,093 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 22:07:11,316 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2021-03-10 22:07:11,590 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2, v_prenex_383], 10=[v_prenex_381]} [2021-03-10 22:07:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:11,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:11,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:11,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:11,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:11,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:11,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:11,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:11,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,145 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2021-03-10 22:07:12,146 INFO L628 ElimStorePlain]: treesize reduction 250, result has 66.6 percent of original size [2021-03-10 22:07:12,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:12,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:12,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,398 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:07:12,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:12,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:12,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:12,410 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:12,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,432 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:12,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,449 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,670 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:07:12,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:12,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 10 dim-0 vars, and 13 xjuncts. [2021-03-10 22:07:12,681 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 10 variables, input treesize:836, output treesize:443 [2021-03-10 22:07:12,991 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 103 [2021-03-10 22:07:15,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:15,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:15,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:15,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:15,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:15,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:15,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,290 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2021-03-10 22:07:15,290 INFO L628 ElimStorePlain]: treesize reduction 602, result has 23.4 percent of original size [2021-03-10 22:07:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:15,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:15,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:15,479 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:15,566 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:15,651 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_397 vanished before elimination [2021-03-10 22:07:15,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-03-10 22:07:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:15,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_398 vanished before elimination [2021-03-10 22:07:15,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_401 vanished before elimination [2021-03-10 22:07:15,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-03-10 22:07:15,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:15,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:15,893 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:15,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:15,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_393 vanished before elimination [2021-03-10 22:07:15,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:15,971 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:16,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:16,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_395 vanished before elimination [2021-03-10 22:07:16,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_394 vanished before elimination [2021-03-10 22:07:16,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 18 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:07:16,046 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 24 variables, input treesize:917, output treesize:136 [2021-03-10 22:07:16,181 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:07:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:16,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:16,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:07:16,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226429865] [2021-03-10 22:07:16,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:16,261 INFO L87 Difference]: Start difference. First operand 741 states and 2548 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,035 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2021-03-10 22:07:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:17,221 INFO L93 Difference]: Finished difference Result 874 states and 2923 transitions. [2021-03-10 22:07:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:07:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:17,223 INFO L225 Difference]: With dead ends: 874 [2021-03-10 22:07:17,223 INFO L226 Difference]: Without dead ends: 859 [2021-03-10 22:07:17,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-03-10 22:07:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 739. [2021-03-10 22:07:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.4430894308943087) internal successors, (2541), 738 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2541 transitions. [2021-03-10 22:07:17,231 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2541 transitions. Word has length 20 [2021-03-10 22:07:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:17,231 INFO L480 AbstractCegarLoop]: Abstraction has 739 states and 2541 transitions. [2021-03-10 22:07:17,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2541 transitions. [2021-03-10 22:07:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:17,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:17,232 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:17,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5945,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:17,433 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash -877073888, now seen corresponding path program 44 times [2021-03-10 22:07:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:17,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275409548] [2021-03-10 22:07:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:17,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275409548] [2021-03-10 22:07:17,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001866187] [2021-03-10 22:07:17,738 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:17,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:07:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:17,974 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-03-10 22:07:18,162 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-03-10 22:07:18,539 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_10], 15=[v_prenex_417]} [2021-03-10 22:07:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:18,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:18,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:18,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:18,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:18,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:18,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:18,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,035 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 108 [2021-03-10 22:07:19,035 INFO L628 ElimStorePlain]: treesize reduction 219, result has 66.4 percent of original size [2021-03-10 22:07:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:19,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:19,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:19,052 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:19,058 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:19,064 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:19,069 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:19,075 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:19,080 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,273 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:07:19,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:19,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:07:19,284 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:753, output treesize:395 [2021-03-10 22:07:19,597 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 119 [2021-03-10 22:07:23,036 INFO L446 ElimStorePlain]: Different costs {15=[ends_with_2, v_prenex_423], 21=[v_prenex_434, v_prenex_424, ends_with_6], 28=[v_prenex_435]} [2021-03-10 22:07:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:23,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:23,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:23,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:23,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:07:23,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:23,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:23,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:23,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:23,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,967 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 149 [2021-03-10 22:07:23,968 INFO L628 ElimStorePlain]: treesize reduction 1230, result has 32.0 percent of original size [2021-03-10 22:07:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:23,975 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:23,983 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,280 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-03-10 22:07:24,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:24,288 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,296 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:24,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,318 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,326 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:24,333 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,340 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,347 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,613 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-10 22:07:24,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:24,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:24,620 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:24,627 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,887 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 22:07:24,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:24,895 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:24,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:24,901 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,161 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-10 22:07:25,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:25,168 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:25,175 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,182 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,189 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:25,196 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,203 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:25,210 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,217 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,225 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,458 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-10 22:07:25,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:25,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 25 dim-0 vars, 6 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-10 22:07:25,464 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 31 variables, input treesize:2156, output treesize:344 [2021-03-10 22:07:25,714 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-03-10 22:07:25,876 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:07:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:25,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:25,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:07:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843495605] [2021-03-10 22:07:25,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:25,960 INFO L87 Difference]: Start difference. First operand 739 states and 2541 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,709 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-10 22:07:26,962 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-03-10 22:07:27,225 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-03-10 22:07:27,606 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-03-10 22:07:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:27,639 INFO L93 Difference]: Finished difference Result 886 states and 2952 transitions. [2021-03-10 22:07:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:27,641 INFO L225 Difference]: With dead ends: 886 [2021-03-10 22:07:27,641 INFO L226 Difference]: Without dead ends: 841 [2021-03-10 22:07:27,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2657.9ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:07:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-03-10 22:07:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 741. [2021-03-10 22:07:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.443243243243243) internal successors, (2548), 740 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2548 transitions. [2021-03-10 22:07:27,649 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2548 transitions. Word has length 20 [2021-03-10 22:07:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:27,650 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 2548 transitions. [2021-03-10 22:07:27,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2548 transitions. [2021-03-10 22:07:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:27,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:27,651 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:27,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6204,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:27,851 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -570151136, now seen corresponding path program 45 times [2021-03-10 22:07:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:27,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115086873] [2021-03-10 22:07:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:28,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115086873] [2021-03-10 22:07:28,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959262289] [2021-03-10 22:07:28,133 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:28,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:07:28,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:28,356 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-10 22:07:28,940 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_446, v_prenex_448], 10=[ends_with_10]} [2021-03-10 22:07:28,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:28,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:28,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:28,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:28,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:28,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:28,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:28,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,782 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 148 [2021-03-10 22:07:29,782 INFO L628 ElimStorePlain]: treesize reduction 323, result has 68.4 percent of original size [2021-03-10 22:07:29,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,146 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-10 22:07:30,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:30,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:30,160 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:30,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:30,174 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:30,180 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:30,187 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:30,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:30,204 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:30,802 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-03-10 22:07:30,802 INFO L628 ElimStorePlain]: treesize reduction 52, result has 91.9 percent of original size [2021-03-10 22:07:30,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-03-10 22:07:30,816 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 10 variables, input treesize:1144, output treesize:590 [2021-03-10 22:07:31,226 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 141 [2021-03-10 22:07:38,212 INFO L446 ElimStorePlain]: Different costs {15=[v_prenex_484], 21=[v_prenex_485], 120=[ends_with_2], 136=[ends_with_6]} [2021-03-10 22:07:38,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:38,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:38,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:38,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:38,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:38,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:38,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:38,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:38,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:38,340 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,361 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 349 DAG size of output: 189 [2021-03-10 22:07:39,362 INFO L628 ElimStorePlain]: treesize reduction 1450, result has 32.7 percent of original size [2021-03-10 22:07:39,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:39,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:39,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,736 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-03-10 22:07:39,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:39,745 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:39,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,760 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,786 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,794 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,803 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,812 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,821 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,830 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,150 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-03-10 22:07:40,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:40,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,160 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,169 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:40,178 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:40,186 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,196 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,206 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,215 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:40,224 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:40,233 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:40,242 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:40,250 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:40,547 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-03-10 22:07:40,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:40,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 33 dim-0 vars, 4 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-10 22:07:40,553 INFO L247 ElimStorePlain]: Needed 33 recursive calls to eliminate 37 variables, input treesize:2532, output treesize:486 [2021-03-10 22:07:40,881 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-03-10 22:07:41,042 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 22:07:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:41,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:07:41,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543066503] [2021-03-10 22:07:41,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:41,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:41,238 INFO L87 Difference]: Start difference. First operand 741 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,050 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2021-03-10 22:07:42,415 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-03-10 22:07:43,141 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-03-10 22:07:43,446 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-03-10 22:07:43,791 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-03-10 22:07:44,229 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-03-10 22:07:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:44,269 INFO L93 Difference]: Finished difference Result 1205 states and 3895 transitions. [2021-03-10 22:07:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:07:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:44,271 INFO L225 Difference]: With dead ends: 1205 [2021-03-10 22:07:44,271 INFO L226 Difference]: Without dead ends: 1160 [2021-03-10 22:07:44,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3769.6ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:07:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-03-10 22:07:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 743. [2021-03-10 22:07:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.4487870619946093) internal successors, (2559), 742 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2559 transitions. [2021-03-10 22:07:44,280 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2559 transitions. Word has length 20 [2021-03-10 22:07:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:44,280 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2559 transitions. [2021-03-10 22:07:44,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2559 transitions. [2021-03-10 22:07:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:44,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:44,282 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:44,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6528 [2021-03-10 22:07:44,482 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash -153141940, now seen corresponding path program 46 times [2021-03-10 22:07:44,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704988060] [2021-03-10 22:07:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704988060] [2021-03-10 22:07:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347640792] [2021-03-10 22:07:44,712 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:44,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:07:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:45,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:45,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:45,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:07:45,868 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:45,877 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:45,892 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:45,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,906 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,920 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,927 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:45,936 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,943 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,950 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:45,959 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:45,967 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:45,975 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:45,981 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:45,990 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:45,997 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:46,007 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,015 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:46,022 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,027 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,033 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,039 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,045 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,051 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,058 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,066 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:07:46,074 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:46,082 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,089 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,097 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,104 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,110 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,116 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,125 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:46,132 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,139 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,159 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,165 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,169 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:46,176 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:46,182 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,186 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:46,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:46,192 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,530 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 22:07:46,530 INFO L628 ElimStorePlain]: treesize reduction 65, result has 82.3 percent of original size [2021-03-10 22:07:46,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:46,535 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:46,540 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:46,544 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:46,549 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:46,553 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:46,564 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,712 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 22:07:46,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:46,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:07:46,714 INFO L247 ElimStorePlain]: Needed 57 recursive calls to eliminate 3 variables, input treesize:2170, output treesize:240 [2021-03-10 22:07:46,943 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:07:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:47,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:07:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912370786] [2021-03-10 22:07:47,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:47,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:47,219 INFO L87 Difference]: Start difference. First operand 743 states and 2559 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,951 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 22:07:48,195 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 22:07:48,506 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:07:48,761 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:07:49,243 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 22:07:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:49,254 INFO L93 Difference]: Finished difference Result 1142 states and 3640 transitions. [2021-03-10 22:07:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:07:49,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:49,256 INFO L225 Difference]: With dead ends: 1142 [2021-03-10 22:07:49,256 INFO L226 Difference]: Without dead ends: 1052 [2021-03-10 22:07:49,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2440.7ms TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-03-10 22:07:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 757. [2021-03-10 22:07:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.458994708994709) internal successors, (2615), 756 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2615 transitions. [2021-03-10 22:07:49,265 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2615 transitions. Word has length 20 [2021-03-10 22:07:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:49,265 INFO L480 AbstractCegarLoop]: Abstraction has 757 states and 2615 transitions. [2021-03-10 22:07:49,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2615 transitions. [2021-03-10 22:07:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:49,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:49,266 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:49,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7158 [2021-03-10 22:07:49,466 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1665161384, now seen corresponding path program 47 times [2021-03-10 22:07:49,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:49,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463802045] [2021-03-10 22:07:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463802045] [2021-03-10 22:07:49,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648477315] [2021-03-10 22:07:49,714 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:49,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:07:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:50,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:50,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:07:50,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25335450] [2021-03-10 22:07:50,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:07:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:07:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:50,274 INFO L87 Difference]: Start difference. First operand 757 states and 2615 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,712 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 22:07:50,923 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-03-10 22:07:51,081 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-10 22:07:51,244 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-03-10 22:07:51,627 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 22:07:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:52,018 INFO L93 Difference]: Finished difference Result 934 states and 3087 transitions. [2021-03-10 22:07:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:07:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:52,019 INFO L225 Difference]: With dead ends: 934 [2021-03-10 22:07:52,019 INFO L226 Difference]: Without dead ends: 904 [2021-03-10 22:07:52,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2003.1ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:07:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-03-10 22:07:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 752. [2021-03-10 22:07:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.4580559254327565) internal successors, (2597), 751 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2597 transitions. [2021-03-10 22:07:52,028 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2597 transitions. Word has length 20 [2021-03-10 22:07:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:52,028 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2597 transitions. [2021-03-10 22:07:52,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2597 transitions. [2021-03-10 22:07:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:52,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:52,029 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:52,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7497 [2021-03-10 22:07:52,229 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1843084844, now seen corresponding path program 48 times [2021-03-10 22:07:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658779275] [2021-03-10 22:07:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658779275] [2021-03-10 22:07:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216956636] [2021-03-10 22:07:52,471 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:52,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:07:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:52,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:07:52,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895333755] [2021-03-10 22:07:52,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:52,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:52,944 INFO L87 Difference]: Start difference. First operand 752 states and 2597 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:53,344 INFO L93 Difference]: Finished difference Result 832 states and 2827 transitions. [2021-03-10 22:07:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:53,345 INFO L225 Difference]: With dead ends: 832 [2021-03-10 22:07:53,345 INFO L226 Difference]: Without dead ends: 817 [2021-03-10 22:07:53,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-03-10 22:07:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 752. [2021-03-10 22:07:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.4580559254327565) internal successors, (2597), 751 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2597 transitions. [2021-03-10 22:07:53,353 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2597 transitions. Word has length 20 [2021-03-10 22:07:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:53,354 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2597 transitions. [2021-03-10 22:07:53,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2597 transitions. [2021-03-10 22:07:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:53,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:53,355 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:53,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7523,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:53,567 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2081522154, now seen corresponding path program 49 times [2021-03-10 22:07:53,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:53,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556622522] [2021-03-10 22:07:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:53,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556622522] [2021-03-10 22:07:53,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14273243] [2021-03-10 22:07:53,824 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:07:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:54,191 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:07:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:54,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:54,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:07:54,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30738107] [2021-03-10 22:07:54,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:54,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:54,467 INFO L87 Difference]: Start difference. First operand 752 states and 2597 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,735 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 22:07:54,907 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 22:07:55,078 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-03-10 22:07:55,441 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-10 22:07:55,669 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 22:07:55,858 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 22:07:55,978 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:07:56,209 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 22:07:56,350 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 22:07:56,530 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:07:56,674 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 22:07:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:56,678 INFO L93 Difference]: Finished difference Result 1050 states and 3354 transitions. [2021-03-10 22:07:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:07:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:56,679 INFO L225 Difference]: With dead ends: 1050 [2021-03-10 22:07:56,679 INFO L226 Difference]: Without dead ends: 975 [2021-03-10 22:07:56,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2577.1ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:07:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-03-10 22:07:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 759. [2021-03-10 22:07:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.453825857519789) internal successors, (2618), 758 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2618 transitions. [2021-03-10 22:07:56,689 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2618 transitions. Word has length 20 [2021-03-10 22:07:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:56,689 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2618 transitions. [2021-03-10 22:07:56,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2618 transitions. [2021-03-10 22:07:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:56,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:56,690 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:56,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7544 [2021-03-10 22:07:56,903 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1028363162, now seen corresponding path program 50 times [2021-03-10 22:07:56,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:56,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607460281] [2021-03-10 22:07:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:57,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607460281] [2021-03-10 22:07:57,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239452767] [2021-03-10 22:07:57,191 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:57,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:07:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:57,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:57,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:57,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,453 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:57,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:57,464 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,468 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:57,488 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,492 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:57,497 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,505 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,509 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:57,514 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:57,518 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,737 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:07:57,738 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-03-10 22:07:57,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:07:57,740 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:699, output treesize:220 [2021-03-10 22:07:57,867 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:07:58,009 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6], 1=[ends_with_10]} [2021-03-10 22:07:58,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:58,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:58,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:58,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:58,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,205 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:07:58,206 INFO L628 ElimStorePlain]: treesize reduction 66, result has 69.6 percent of original size [2021-03-10 22:07:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:58,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:58,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:58,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:58,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:07:58,287 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:272, output treesize:143 [2021-03-10 22:07:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:58,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:58,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:07:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687142053] [2021-03-10 22:07:58,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:58,634 INFO L87 Difference]: Start difference. First operand 759 states and 2618 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,119 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 22:07:59,660 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 22:07:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:59,665 INFO L93 Difference]: Finished difference Result 962 states and 3188 transitions. [2021-03-10 22:07:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:59,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:07:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:59,667 INFO L225 Difference]: With dead ends: 962 [2021-03-10 22:07:59,667 INFO L226 Difference]: Without dead ends: 947 [2021-03-10 22:07:59,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1472.3ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-03-10 22:07:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 759. [2021-03-10 22:07:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.453825857519789) internal successors, (2618), 758 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2618 transitions. [2021-03-10 22:07:59,676 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2618 transitions. Word has length 20 [2021-03-10 22:07:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:59,676 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2618 transitions. [2021-03-10 22:07:59,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2618 transitions. [2021-03-10 22:07:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:07:59,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:59,677 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:59,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7566 [2021-03-10 22:07:59,877 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1968711554, now seen corresponding path program 51 times [2021-03-10 22:07:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:59,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047590427] [2021-03-10 22:07:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047590427] [2021-03-10 22:08:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552761379] [2021-03-10 22:08:00,105 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:00,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:00,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,370 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:00,380 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,391 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,397 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,403 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:00,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,412 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,417 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,423 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,428 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,433 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:00,438 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:00,443 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,448 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,452 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:00,457 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:00,461 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,724 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:08:00,725 INFO L628 ElimStorePlain]: treesize reduction 124, result has 65.7 percent of original size [2021-03-10 22:08:00,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:08:00,726 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 1 variables, input treesize:941, output treesize:237 [2021-03-10 22:08:00,872 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 22:08:01,063 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_490, v_prenex_492, v_prenex_494], 1=[v_prenex_489, ends_with_10, v_prenex_491, v_prenex_493]} [2021-03-10 22:08:01,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:01,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:01,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,263 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 22:08:01,263 INFO L628 ElimStorePlain]: treesize reduction 124, result has 57.8 percent of original size [2021-03-10 22:08:01,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:01,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:01,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:01,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:01,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:01,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:01,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:01,755 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:01,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:01,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:08:01,828 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 8 variables, input treesize:337, output treesize:127 [2021-03-10 22:08:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:02,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:02,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:02,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841695420] [2021-03-10 22:08:02,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:02,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:02,064 INFO L87 Difference]: Start difference. First operand 759 states and 2618 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,605 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 22:08:02,764 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:08:03,173 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 22:08:03,346 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:08:03,573 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-03-10 22:08:03,823 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:08:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:04,086 INFO L93 Difference]: Finished difference Result 1072 states and 3455 transitions. [2021-03-10 22:08:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:04,088 INFO L225 Difference]: With dead ends: 1072 [2021-03-10 22:08:04,088 INFO L226 Difference]: Without dead ends: 1012 [2021-03-10 22:08:04,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2345.8ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:08:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-03-10 22:08:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 785. [2021-03-10 22:08:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.457908163265306) internal successors, (2711), 784 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2711 transitions. [2021-03-10 22:08:04,097 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2711 transitions. Word has length 20 [2021-03-10 22:08:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:04,097 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2711 transitions. [2021-03-10 22:08:04,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2711 transitions. [2021-03-10 22:08:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:04,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:04,098 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:04,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7636,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,298 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash 731689778, now seen corresponding path program 52 times [2021-03-10 22:08:04,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:04,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916179578] [2021-03-10 22:08:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:04,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916179578] [2021-03-10 22:08:04,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870142520] [2021-03-10 22:08:04,577 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:04,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:04,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:04,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,885 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:04,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:04,896 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:04,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:04,907 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,911 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:04,917 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,337 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-03-10 22:08:05,337 INFO L628 ElimStorePlain]: treesize reduction 41, result has 90.4 percent of original size [2021-03-10 22:08:05,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 10 xjuncts. [2021-03-10 22:08:05,341 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 2 variables, input treesize:582, output treesize:387 [2021-03-10 22:08:05,711 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2021-03-10 22:08:06,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,852 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 10 treesize of output 1 [2021-03-10 22:08:06,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,448 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 114 [2021-03-10 22:08:07,448 INFO L628 ElimStorePlain]: treesize reduction 1178, result has 20.7 percent of original size [2021-03-10 22:08:07,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_537 vanished before elimination [2021-03-10 22:08:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:07,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,625 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-10 22:08:07,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:07,625 INFO L518 ElimStorePlain]: Eliminatee v_prenex_536 vanished before elimination [2021-03-10 22:08:07,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:07,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,802 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 22:08:07,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:07,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,975 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:08:07,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:07,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_517 vanished before elimination [2021-03-10 22:08:07,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:07,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,147 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:08:08,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-03-10 22:08:08,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-03-10 22:08:08,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_518 vanished before elimination [2021-03-10 22:08:08,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_540 vanished before elimination [2021-03-10 22:08:08,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:08,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,315 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:08:08,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_520 vanished before elimination [2021-03-10 22:08:08,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_541 vanished before elimination [2021-03-10 22:08:08,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:08,321 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,478 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:08:08,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_500 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_521 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_523 vanished before elimination [2021-03-10 22:08:08,479 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-03-10 22:08:08,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:08,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,646 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:08:08,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:08,652 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,807 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:08:08,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,807 INFO L518 ElimStorePlain]: Eliminatee v_prenex_503 vanished before elimination [2021-03-10 22:08:08,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:08,813 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:08,962 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-10 22:08:08,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:08,968 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,117 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:08:09,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-03-10 22:08:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:09,123 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,270 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:08:09,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,270 INFO L518 ElimStorePlain]: Eliminatee v_prenex_527 vanished before elimination [2021-03-10 22:08:09,270 INFO L518 ElimStorePlain]: Eliminatee v_prenex_508 vanished before elimination [2021-03-10 22:08:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:09,276 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,422 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:08:09,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:09,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,572 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:08:09,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_509 vanished before elimination [2021-03-10 22:08:09,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_496 vanished before elimination [2021-03-10 22:08:09,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_498 vanished before elimination [2021-03-10 22:08:09,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:09,578 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,720 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:08:09,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_497 vanished before elimination [2021-03-10 22:08:09,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:09,726 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,865 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:08:09,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,865 INFO L518 ElimStorePlain]: Eliminatee v_prenex_511 vanished before elimination [2021-03-10 22:08:09,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:09,871 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:10,014 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:08:10,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_535 vanished before elimination [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_513 vanished before elimination [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_534 vanished before elimination [2021-03-10 22:08:10,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_512 vanished before elimination [2021-03-10 22:08:10,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 48 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:08:10,017 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 54 variables, input treesize:1529, output treesize:227 [2021-03-10 22:08:10,169 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:08:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:10,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:10,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:10,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059130961] [2021-03-10 22:08:10,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:10,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:10,445 INFO L87 Difference]: Start difference. First operand 785 states and 2711 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,100 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 22:08:11,487 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-03-10 22:08:11,877 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 22:08:12,215 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-03-10 22:08:12,586 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-03-10 22:08:12,912 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-03-10 22:08:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:13,115 INFO L93 Difference]: Finished difference Result 1233 states and 3921 transitions. [2021-03-10 22:08:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:08:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:13,117 INFO L225 Difference]: With dead ends: 1233 [2021-03-10 22:08:13,117 INFO L226 Difference]: Without dead ends: 1128 [2021-03-10 22:08:13,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3231.7ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-03-10 22:08:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 791. [2021-03-10 22:08:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.473417721518987) internal successors, (2744), 790 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2744 transitions. [2021-03-10 22:08:13,127 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2744 transitions. Word has length 20 [2021-03-10 22:08:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:13,127 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2744 transitions. [2021-03-10 22:08:13,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2744 transitions. [2021-03-10 22:08:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:13,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:13,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:13,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7681 [2021-03-10 22:08:13,335 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash 143717076, now seen corresponding path program 53 times [2021-03-10 22:08:13,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:13,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319938942] [2021-03-10 22:08:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:13,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319938942] [2021-03-10 22:08:13,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342189775] [2021-03-10 22:08:13,566 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:13,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:13,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:13,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:08:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:14,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:14,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:08:14,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712471154] [2021-03-10 22:08:14,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:08:14,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:08:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:14,158 INFO L87 Difference]: Start difference. First operand 791 states and 2744 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,406 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 22:08:14,616 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 22:08:14,973 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-10 22:08:15,201 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:08:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:15,397 INFO L93 Difference]: Finished difference Result 1005 states and 3375 transitions. [2021-03-10 22:08:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:15,399 INFO L225 Difference]: With dead ends: 1005 [2021-03-10 22:08:15,399 INFO L226 Difference]: Without dead ends: 990 [2021-03-10 22:08:15,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1515.6ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-03-10 22:08:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 791. [2021-03-10 22:08:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.473417721518987) internal successors, (2744), 790 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2744 transitions. [2021-03-10 22:08:15,409 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2744 transitions. Word has length 20 [2021-03-10 22:08:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:15,409 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 2744 transitions. [2021-03-10 22:08:15,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2744 transitions. [2021-03-10 22:08:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:15,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:15,410 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:15,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7892,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:15,610 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1177710784, now seen corresponding path program 54 times [2021-03-10 22:08:15,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:15,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851761620] [2021-03-10 22:08:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:15,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851761620] [2021-03-10 22:08:15,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799672378] [2021-03-10 22:08:15,838 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:15,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:08:15,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:08:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:16,303 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:08:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:16,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:16,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968944881] [2021-03-10 22:08:16,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:16,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:16,517 INFO L87 Difference]: Start difference. First operand 791 states and 2744 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,954 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 22:08:17,340 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-03-10 22:08:17,489 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 22:08:18,154 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-10 22:08:18,276 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:08:18,537 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-03-10 22:08:18,660 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:08:18,805 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 22:08:19,268 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-03-10 22:08:19,486 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-10 22:08:19,869 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-03-10 22:08:20,002 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 22:08:20,367 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-03-10 22:08:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:20,387 INFO L93 Difference]: Finished difference Result 2092 states and 6661 transitions. [2021-03-10 22:08:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:08:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:20,390 INFO L225 Difference]: With dead ends: 2092 [2021-03-10 22:08:20,390 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 22:08:20,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4058.4ms TimeCoverageRelationStatistics Valid=368, Invalid=1354, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:08:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 22:08:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 840. [2021-03-10 22:08:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.542312276519666) internal successors, (2972), 839 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2972 transitions. [2021-03-10 22:08:20,404 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2972 transitions. Word has length 20 [2021-03-10 22:08:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:20,404 INFO L480 AbstractCegarLoop]: Abstraction has 840 states and 2972 transitions. [2021-03-10 22:08:20,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2972 transitions. [2021-03-10 22:08:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:20,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:20,405 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:20,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7911 [2021-03-10 22:08:20,605 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1605237068, now seen corresponding path program 55 times [2021-03-10 22:08:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:20,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781138989] [2021-03-10 22:08:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:20,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781138989] [2021-03-10 22:08:20,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437503759] [2021-03-10 22:08:20,814 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:21,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:21,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733981050] [2021-03-10 22:08:21,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:21,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:21,360 INFO L87 Difference]: Start difference. First operand 840 states and 2972 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:21,947 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 22:08:22,147 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 22:08:22,421 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 22:08:22,897 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-10 22:08:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:22,918 INFO L93 Difference]: Finished difference Result 1237 states and 4134 transitions. [2021-03-10 22:08:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:08:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:22,920 INFO L225 Difference]: With dead ends: 1237 [2021-03-10 22:08:22,920 INFO L226 Difference]: Without dead ends: 1207 [2021-03-10 22:08:22,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1703.9ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-03-10 22:08:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 837. [2021-03-10 22:08:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.541866028708134) internal successors, (2961), 836 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2961 transitions. [2021-03-10 22:08:22,931 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2961 transitions. Word has length 20 [2021-03-10 22:08:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:22,931 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2961 transitions. [2021-03-10 22:08:22,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2961 transitions. [2021-03-10 22:08:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:22,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:22,932 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:23,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7928,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:23,132 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash 568028312, now seen corresponding path program 56 times [2021-03-10 22:08:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:23,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164959042] [2021-03-10 22:08:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:23,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164959042] [2021-03-10 22:08:23,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979836128] [2021-03-10 22:08:23,345 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:23,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:23,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:08:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:23,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:23,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:23,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811072606] [2021-03-10 22:08:23,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:23,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:23,870 INFO L87 Difference]: Start difference. First operand 837 states and 2961 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:24,265 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:08:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:24,320 INFO L93 Difference]: Finished difference Result 995 states and 3409 transitions. [2021-03-10 22:08:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:24,321 INFO L225 Difference]: With dead ends: 995 [2021-03-10 22:08:24,321 INFO L226 Difference]: Without dead ends: 980 [2021-03-10 22:08:24,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-03-10 22:08:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 834. [2021-03-10 22:08:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.545018007202881) internal successors, (2953), 833 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2953 transitions. [2021-03-10 22:08:24,330 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2953 transitions. Word has length 20 [2021-03-10 22:08:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:24,330 INFO L480 AbstractCegarLoop]: Abstraction has 834 states and 2953 transitions. [2021-03-10 22:08:24,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2953 transitions. [2021-03-10 22:08:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:24,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:24,332 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:24,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7943,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:24,532 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash 79225828, now seen corresponding path program 57 times [2021-03-10 22:08:24,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:24,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006845008] [2021-03-10 22:08:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006845008] [2021-03-10 22:08:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478636270] [2021-03-10 22:08:24,742 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:24,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:25,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:25,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:25,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:25,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:25,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:25,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:25,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:25,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:25,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:25,134 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:25,139 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:25,145 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:25,149 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:25,154 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:25,159 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:25,164 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:25,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 7 xjuncts. [2021-03-10 22:08:25,263 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:522, output treesize:191 [2021-03-10 22:08:25,444 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-03-10 22:08:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:26,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,465 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 22:08:26,465 INFO L628 ElimStorePlain]: treesize reduction 129, result has 43.9 percent of original size [2021-03-10 22:08:26,465 INFO L518 ElimStorePlain]: Eliminatee v_prenex_550 vanished before elimination [2021-03-10 22:08:26,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:26,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:26,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_548 vanished before elimination [2021-03-10 22:08:26,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:26,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:26,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:26,572 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:240, output treesize:90 [2021-03-10 22:08:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:26,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:26,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672366699] [2021-03-10 22:08:26,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:26,709 INFO L87 Difference]: Start difference. First operand 834 states and 2953 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,345 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-03-10 22:08:27,576 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-03-10 22:08:28,081 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-03-10 22:08:28,228 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 22:08:28,543 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-03-10 22:08:28,721 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2021-03-10 22:08:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:28,921 INFO L93 Difference]: Finished difference Result 1457 states and 4659 transitions. [2021-03-10 22:08:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:08:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:28,923 INFO L225 Difference]: With dead ends: 1457 [2021-03-10 22:08:28,923 INFO L226 Difference]: Without dead ends: 1364 [2021-03-10 22:08:28,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2492.6ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:08:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-03-10 22:08:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 939. [2021-03-10 22:08:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.593816631130064) internal successors, (3371), 938 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3371 transitions. [2021-03-10 22:08:28,935 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3371 transitions. Word has length 20 [2021-03-10 22:08:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:28,935 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 3371 transitions. [2021-03-10 22:08:28,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3371 transitions. [2021-03-10 22:08:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:28,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:28,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:29,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7964,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:29,137 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -200334708, now seen corresponding path program 58 times [2021-03-10 22:08:29,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:29,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178299264] [2021-03-10 22:08:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178299264] [2021-03-10 22:08:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955699770] [2021-03-10 22:08:29,407 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:29,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:29,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:29,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:29,682 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 22:08:29,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:29,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:29,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:29,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:29,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:29,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,434 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-03-10 22:08:30,434 INFO L628 ElimStorePlain]: treesize reduction 483, result has 42.4 percent of original size [2021-03-10 22:08:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,658 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:08:30,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:30,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:30,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:30,669 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,876 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:08:30,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,882 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,887 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:31,091 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:08:31,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:31,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:08:31,095 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:989, output treesize:329 [2021-03-10 22:08:31,295 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:08:31,462 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:08:32,971 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_577, v_prenex_567], 3=[v_prenex_562, v_prenex_572, v_prenex_564, v_prenex_563, v_prenex_566, v_prenex_565, ends_with_10], 15=[v_prenex_561, v_prenex_568, ends_with_6, v_prenex_581], 21=[v_prenex_573]} [2021-03-10 22:08:32,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:32,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:32,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:32,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:33,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:33,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:33,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:33,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:33,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,695 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 127 [2021-03-10 22:08:33,696 INFO L628 ElimStorePlain]: treesize reduction 1257, result has 23.8 percent of original size [2021-03-10 22:08:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:33,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:33,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,923 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 22:08:33,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:33,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,134 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 22:08:34,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:34,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_572 vanished before elimination [2021-03-10 22:08:34,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_564 vanished before elimination [2021-03-10 22:08:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:34,141 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,343 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 22:08:34,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:34,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,552 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-10 22:08:34,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:34,553 INFO L518 ElimStorePlain]: Eliminatee v_prenex_565 vanished before elimination [2021-03-10 22:08:34,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:34,560 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:34,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,766 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:08:34,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:34,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:34,774 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,967 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:08:34,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:34,983 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:34,990 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,332 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 106 [2021-03-10 22:08:35,332 INFO L628 ElimStorePlain]: treesize reduction 40, result has 88.7 percent of original size [2021-03-10 22:08:35,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:35,339 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,500 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 22:08:35,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:35,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:35,507 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:35,513 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,667 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 22:08:35,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:35,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:35,673 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:35,679 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,827 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:08:35,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:35,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 14 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:08:35,831 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 30 variables, input treesize:1881, output treesize:190 [2021-03-10 22:08:36,023 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 22:08:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:36,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:36,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:36,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550039815] [2021-03-10 22:08:36,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:36,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:36,190 INFO L87 Difference]: Start difference. First operand 939 states and 3371 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,756 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2021-03-10 22:08:37,298 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 22:08:37,553 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-10 22:08:37,774 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-10 22:08:38,020 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-03-10 22:08:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:38,034 INFO L93 Difference]: Finished difference Result 1207 states and 4146 transitions. [2021-03-10 22:08:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:08:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:38,036 INFO L225 Difference]: With dead ends: 1207 [2021-03-10 22:08:38,036 INFO L226 Difference]: Without dead ends: 1162 [2021-03-10 22:08:38,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2448.1ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-03-10 22:08:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 939. [2021-03-10 22:08:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.593816631130064) internal successors, (3371), 938 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3371 transitions. [2021-03-10 22:08:38,047 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3371 transitions. Word has length 20 [2021-03-10 22:08:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:38,047 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 3371 transitions. [2021-03-10 22:08:38,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3371 transitions. [2021-03-10 22:08:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:38,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:38,048 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:38,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8166 [2021-03-10 22:08:38,251 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash 984747272, now seen corresponding path program 59 times [2021-03-10 22:08:38,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:38,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340001640] [2021-03-10 22:08:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:38,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340001640] [2021-03-10 22:08:38,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903259251] [2021-03-10 22:08:38,528 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:38,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:38,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:08:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:39,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:39,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:08:39,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609477346] [2021-03-10 22:08:39,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:08:39,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:08:39,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:39,141 INFO L87 Difference]: Start difference. First operand 939 states and 3371 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,721 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 22:08:40,071 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-03-10 22:08:40,346 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-03-10 22:08:40,551 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 22:08:40,766 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-03-10 22:08:40,933 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-03-10 22:08:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:40,952 INFO L93 Difference]: Finished difference Result 1327 states and 4459 transitions. [2021-03-10 22:08:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:08:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:40,954 INFO L225 Difference]: With dead ends: 1327 [2021-03-10 22:08:40,954 INFO L226 Difference]: Without dead ends: 1252 [2021-03-10 22:08:40,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1993.5ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:08:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-03-10 22:08:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 920. [2021-03-10 22:08:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.5832426550598475) internal successors, (3293), 919 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3293 transitions. [2021-03-10 22:08:40,965 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3293 transitions. Word has length 20 [2021-03-10 22:08:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:40,965 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 3293 transitions. [2021-03-10 22:08:40,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3293 transitions. [2021-03-10 22:08:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:40,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:40,967 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:41,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8390,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:41,167 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash 136124800, now seen corresponding path program 60 times [2021-03-10 22:08:41,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:41,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323432628] [2021-03-10 22:08:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:41,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323432628] [2021-03-10 22:08:41,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640053733] [2021-03-10 22:08:41,434 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:41,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:41,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:08:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:41,690 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:08:42,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:08:42,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:42,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:42,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:42,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,527 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 103 [2021-03-10 22:08:42,527 INFO L628 ElimStorePlain]: treesize reduction 328, result has 52.1 percent of original size [2021-03-10 22:08:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:42,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:42,541 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,738 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:08:42,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:42,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:42,745 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:42,751 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,944 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-03-10 22:08:42,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:42,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:42,957 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:43,145 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:08:43,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:43,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-03-10 22:08:43,156 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 13 variables, input treesize:809, output treesize:333 [2021-03-10 22:08:43,361 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-10 22:08:45,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:45,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:45,292 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,063 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 147 [2021-03-10 22:08:46,064 INFO L628 ElimStorePlain]: treesize reduction 1503, result has 23.3 percent of original size [2021-03-10 22:08:46,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:46,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,318 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-03-10 22:08:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:46,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,577 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-10 22:08:46,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:46,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:46,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,824 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 22:08:46,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:46,833 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,067 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-10 22:08:47,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:47,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,308 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-10 22:08:47,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:47,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:47,325 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,550 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 22:08:47,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:47,560 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,784 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 22:08:47,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:47,792 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:47,799 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,014 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-10 22:08:48,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,022 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,251 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 22:08:48,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,259 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,472 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 22:08:48,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,479 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,691 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 22:08:48,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:48,699 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:48,707 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,909 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-10 22:08:48,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,916 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,116 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:08:49,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:49,123 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,321 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:08:49,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:49,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:49,328 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:49,335 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,528 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:08:49,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:49,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 16 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:08:49,538 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 25 variables, input treesize:2177, output treesize:283 [2021-03-10 22:08:49,812 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-03-10 22:08:50,011 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:08:50,186 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:08:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:50,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:50,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:08:50,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855223300] [2021-03-10 22:08:50,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:50,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:50,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:50,271 INFO L87 Difference]: Start difference. First operand 920 states and 3293 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:51,167 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-03-10 22:08:51,469 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-03-10 22:08:51,921 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-03-10 22:08:52,300 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-03-10 22:08:52,805 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-03-10 22:08:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:52,819 INFO L93 Difference]: Finished difference Result 1388 states and 4567 transitions. [2021-03-10 22:08:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:52,822 INFO L225 Difference]: With dead ends: 1388 [2021-03-10 22:08:52,822 INFO L226 Difference]: Without dead ends: 1313 [2021-03-10 22:08:52,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3393.6ms TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-03-10 22:08:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 918. [2021-03-10 22:08:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.5856052344601963) internal successors, (3288), 917 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3288 transitions. [2021-03-10 22:08:52,834 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3288 transitions. Word has length 20 [2021-03-10 22:08:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:52,834 INFO L480 AbstractCegarLoop]: Abstraction has 918 states and 3288 transitions. [2021-03-10 22:08:52,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3288 transitions. [2021-03-10 22:08:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:52,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:52,835 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:53,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8415,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:53,036 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash -821811394, now seen corresponding path program 61 times [2021-03-10 22:08:53,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:53,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976338253] [2021-03-10 22:08:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976338253] [2021-03-10 22:08:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734907582] [2021-03-10 22:08:53,257 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:08:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:53,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:53,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:53,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:08:53,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:53,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:53,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:53,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:53,662 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:53,668 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:53,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:53,690 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:53,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:53,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:53,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:53,712 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:53,717 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:53,721 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:53,726 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:53,732 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:08:53,738 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:53,743 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,105 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:08:54,105 INFO L628 ElimStorePlain]: treesize reduction 72, result has 82.0 percent of original size [2021-03-10 22:08:54,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:08:54,109 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:814, output treesize:328 [2021-03-10 22:08:54,429 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-03-10 22:08:56,154 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_615], 1=[v_prenex_624, v_prenex_616, v_prenex_626, v_prenex_618, v_prenex_617, v_prenex_619, v_prenex_630, v_prenex_621, v_prenex_620, v_prenex_631, v_prenex_634, v_prenex_623, v_prenex_622], 3=[ends_with_10], 10=[ends_with_6, v_prenex_636, v_prenex_613, v_prenex_627]} [2021-03-10 22:08:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:56,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,609 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 83 [2021-03-10 22:08:56,610 INFO L628 ElimStorePlain]: treesize reduction 1005, result has 21.5 percent of original size [2021-03-10 22:08:56,610 INFO L518 ElimStorePlain]: Eliminatee v_prenex_624 vanished before elimination [2021-03-10 22:08:56,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:56,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,875 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-03-10 22:08:56,876 INFO L628 ElimStorePlain]: treesize reduction 31, result has 88.6 percent of original size [2021-03-10 22:08:56,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:56,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:56,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,011 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:08:57,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,011 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-03-10 22:08:57,011 INFO L518 ElimStorePlain]: Eliminatee v_prenex_617 vanished before elimination [2021-03-10 22:08:57,011 INFO L518 ElimStorePlain]: Eliminatee v_prenex_619 vanished before elimination [2021-03-10 22:08:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:57,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,138 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:08:57,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_621 vanished before elimination [2021-03-10 22:08:57,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_620 vanished before elimination [2021-03-10 22:08:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:57,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,273 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:08:57,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:57,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,394 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:08:57,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,395 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-03-10 22:08:57,395 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-03-10 22:08:57,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:57,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:57,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,516 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:08:57,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:57,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,630 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:08:57,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:57,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,742 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:08:57,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:57,748 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,854 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:08:57,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:57,859 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:57,864 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:57,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:57,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 19 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:08:57,972 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 30 variables, input treesize:1284, output treesize:127 [2021-03-10 22:08:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:58,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:58,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137916900] [2021-03-10 22:08:58,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:58,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:58,148 INFO L87 Difference]: Start difference. First operand 918 states and 3288 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,704 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-03-10 22:08:58,913 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:08:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:58,943 INFO L93 Difference]: Finished difference Result 1048 states and 3662 transitions. [2021-03-10 22:08:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:58,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:08:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:58,945 INFO L225 Difference]: With dead ends: 1048 [2021-03-10 22:08:58,945 INFO L226 Difference]: Without dead ends: 1033 [2021-03-10 22:08:58,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1335.5ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-03-10 22:08:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 918. [2021-03-10 22:08:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.5856052344601963) internal successors, (3288), 917 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3288 transitions. [2021-03-10 22:08:58,955 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3288 transitions. Word has length 20 [2021-03-10 22:08:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:58,955 INFO L480 AbstractCegarLoop]: Abstraction has 918 states and 3288 transitions. [2021-03-10 22:08:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3288 transitions. [2021-03-10 22:08:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:08:58,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:58,957 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:59,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9044 [2021-03-10 22:08:59,157 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -100687916, now seen corresponding path program 62 times [2021-03-10 22:08:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:59,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067559140] [2021-03-10 22:08:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:59,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067559140] [2021-03-10 22:08:59,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807046476] [2021-03-10 22:08:59,476 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:59,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:08:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:59,744 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 22:09:00,021 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2021-03-10 22:09:00,785 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_641, v_prenex_644, v_prenex_647], 10=[ends_with_10]} [2021-03-10 22:09:00,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:00,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:00,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:00,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:00,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:00,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:00,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:00,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,598 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 130 [2021-03-10 22:09:01,599 INFO L628 ElimStorePlain]: treesize reduction 411, result has 61.2 percent of original size [2021-03-10 22:09:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:01,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:01,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,227 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2021-03-10 22:09:02,228 INFO L628 ElimStorePlain]: treesize reduction 45, result has 93.0 percent of original size [2021-03-10 22:09:02,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:02,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,541 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 22:09:02,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:02,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:02,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:02,562 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:02,568 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:02,575 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:02,581 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:02,588 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:02,594 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,131 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 116 [2021-03-10 22:09:03,131 INFO L628 ElimStorePlain]: treesize reduction 42, result has 92.4 percent of original size [2021-03-10 22:09:03,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 13 xjuncts. [2021-03-10 22:09:03,147 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 13 variables, input treesize:1137, output treesize:514 [2021-03-10 22:09:03,530 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 115 [2021-03-10 22:09:06,906 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_661, v_prenex_660, v_prenex_675, v_prenex_656, v_prenex_655, v_prenex_658, v_prenex_657, v_prenex_659], 15=[v_prenex_662], 21=[v_prenex_672, ends_with_2, v_prenex_665], 28=[ends_with_6]} [2021-03-10 22:09:06,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:06,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:06,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,188 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 331 DAG size of output: 163 [2021-03-10 22:09:08,188 INFO L628 ElimStorePlain]: treesize reduction 1832, result has 27.0 percent of original size [2021-03-10 22:09:08,188 INFO L518 ElimStorePlain]: Eliminatee v_prenex_660 vanished before elimination [2021-03-10 22:09:08,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:08,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,592 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-03-10 22:09:08,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:08,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-03-10 22:09:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:08,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,998 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-03-10 22:09:08,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:08,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_658 vanished before elimination [2021-03-10 22:09:09,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:09,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,390 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-03-10 22:09:09,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:09,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_659 vanished before elimination [2021-03-10 22:09:09,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:09,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:09,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,783 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-03-10 22:09:09,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:09,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:09,792 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:09,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:09,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:09,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:09,816 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,503 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 147 [2021-03-10 22:09:10,504 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.8 percent of original size [2021-03-10 22:09:10,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:10,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:10,520 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:10,528 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:10,537 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:10,545 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:10,567 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:10,576 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:10,585 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:10,593 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,902 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 22:09:10,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:10,910 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,220 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-03-10 22:09:11,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:11,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:11,229 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:11,237 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:11,245 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:11,253 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:11,261 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:11,268 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:11,276 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:11,284 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:11,292 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,574 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 22:09:11,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:11,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 25 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-10 22:09:11,580 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 38 variables, input treesize:2571, output treesize:344 [2021-03-10 22:09:11,848 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-10 22:09:12,030 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:09:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:12,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:12,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:09:12,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727390945] [2021-03-10 22:09:12,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:12,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:12,120 INFO L87 Difference]: Start difference. First operand 918 states and 3288 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,687 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 22:09:12,959 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-03-10 22:09:13,333 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-03-10 22:09:13,750 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-03-10 22:09:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:13,781 INFO L93 Difference]: Finished difference Result 1070 states and 3713 transitions. [2021-03-10 22:09:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:13,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:13,783 INFO L225 Difference]: With dead ends: 1070 [2021-03-10 22:09:13,783 INFO L226 Difference]: Without dead ends: 1025 [2021-03-10 22:09:13,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2854.9ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-03-10 22:09:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 916. [2021-03-10 22:09:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.5879781420765027) internal successors, (3283), 915 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3283 transitions. [2021-03-10 22:09:13,793 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3283 transitions. Word has length 20 [2021-03-10 22:09:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:13,793 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 3283 transitions. [2021-03-10 22:09:13,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3283 transitions. [2021-03-10 22:09:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:13,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:13,795 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:13,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9262,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:13,995 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 206234836, now seen corresponding path program 63 times [2021-03-10 22:09:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:13,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674163938] [2021-03-10 22:09:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:14,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674163938] [2021-03-10 22:09:14,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639659438] [2021-03-10 22:09:14,297 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:14,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:14,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:09:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:14,538 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-10 22:09:15,259 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_693, v_prenex_686, v_prenex_689, ends_with_10], 10=[v_prenex_690]} [2021-03-10 22:09:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:09:15,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:15,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:15,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:15,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:16,272 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 153 [2021-03-10 22:09:16,273 INFO L628 ElimStorePlain]: treesize reduction 536, result has 57.8 percent of original size [2021-03-10 22:09:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:16,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:16,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:16,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:16,708 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-10 22:09:16,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:16,717 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:16,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,431 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2021-03-10 22:09:17,432 INFO L628 ElimStorePlain]: treesize reduction 110, result has 84.5 percent of original size [2021-03-10 22:09:17,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:17,439 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,784 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-03-10 22:09:17,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:17,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:17,792 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:17,800 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:17,807 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,139 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-10 22:09:18,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:18,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 5 dim-1 vars, End of recursive call: 13 dim-0 vars, and 12 xjuncts. [2021-03-10 22:09:18,160 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:1347, output treesize:587 [2021-03-10 22:09:18,599 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 140 [2021-03-10 22:09:21,137 INFO L446 ElimStorePlain]: Different costs {15=[v_prenex_703], 21=[v_prenex_704], 28=[ends_with_2], 36=[ends_with_6]} [2021-03-10 22:09:21,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:21,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:21,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:21,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:21,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:09:21,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:21,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:21,226 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:21,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,274 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 227 DAG size of output: 168 [2021-03-10 22:09:22,275 INFO L628 ElimStorePlain]: treesize reduction 1444, result has 32.9 percent of original size [2021-03-10 22:09:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:22,283 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:22,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,678 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-03-10 22:09:22,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,687 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:22,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:22,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,710 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,719 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:22,727 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:22,736 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:22,745 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,753 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,762 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,770 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,452 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2021-03-10 22:09:23,453 INFO L628 ElimStorePlain]: treesize reduction 53, result has 91.8 percent of original size [2021-03-10 22:09:23,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:23,461 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:23,468 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:23,476 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:23,483 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:23,491 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:23,499 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:23,506 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:23,514 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:23,522 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:23,530 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,824 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-10 22:09:23,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:23,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-03-10 22:09:23,830 INFO L247 ElimStorePlain]: Needed 32 recursive calls to eliminate 21 variables, input treesize:2532, output treesize:453 [2021-03-10 22:09:24,172 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2021-03-10 22:09:24,343 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 22:09:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:24,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:24,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:09:24,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958791212] [2021-03-10 22:09:24,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:24,612 INFO L87 Difference]: Start difference. First operand 916 states and 3283 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,103 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 22:09:25,292 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-10 22:09:25,853 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-03-10 22:09:26,175 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-03-10 22:09:26,533 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-03-10 22:09:26,908 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 22:09:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:26,953 INFO L93 Difference]: Finished difference Result 1257 states and 4267 transitions. [2021-03-10 22:09:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:09:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:26,955 INFO L225 Difference]: With dead ends: 1257 [2021-03-10 22:09:26,955 INFO L226 Difference]: Without dead ends: 1212 [2021-03-10 22:09:26,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3374.8ms TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:09:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-03-10 22:09:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 916. [2021-03-10 22:09:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.5879781420765027) internal successors, (3283), 915 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3283 transitions. [2021-03-10 22:09:26,966 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3283 transitions. Word has length 20 [2021-03-10 22:09:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:26,966 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 3283 transitions. [2021-03-10 22:09:26,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3283 transitions. [2021-03-10 22:09:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:26,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:26,968 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:27,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9684,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:27,168 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash 623244032, now seen corresponding path program 64 times [2021-03-10 22:09:27,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:27,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520153143] [2021-03-10 22:09:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:27,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520153143] [2021-03-10 22:09:27,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487794990] [2021-03-10 22:09:27,403 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:27,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:27,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:09:27,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:27,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:27,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:27,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:27,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:27,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:27,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:27,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:27,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:27,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:27,660 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:27,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:27,874 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:09:27,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:27,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-03-10 22:09:27,879 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:458, output treesize:361 [2021-03-10 22:09:28,262 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-03-10 22:09:29,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:29,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:29,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:29,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:29,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:29,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:29,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,096 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 112 [2021-03-10 22:09:30,096 INFO L628 ElimStorePlain]: treesize reduction 1470, result has 17.6 percent of original size [2021-03-10 22:09:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:30,104 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,285 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:09:30,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,286 INFO L518 ElimStorePlain]: Eliminatee v_prenex_713 vanished before elimination [2021-03-10 22:09:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:30,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,467 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 22:09:30,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:30,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,652 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:09:30,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-03-10 22:09:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:30,660 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,834 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:09:30,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,834 INFO L518 ElimStorePlain]: Eliminatee v_prenex_714 vanished before elimination [2021-03-10 22:09:30,834 INFO L518 ElimStorePlain]: Eliminatee v_prenex_739 vanished before elimination [2021-03-10 22:09:30,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:30,841 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,009 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-03-10 22:09:31,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_738 vanished before elimination [2021-03-10 22:09:31,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_716 vanished before elimination [2021-03-10 22:09:31,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_719 vanished before elimination [2021-03-10 22:09:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:31,016 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,181 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:09:31,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_742 vanished before elimination [2021-03-10 22:09:31,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_720 vanished before elimination [2021-03-10 22:09:31,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_741 vanished before elimination [2021-03-10 22:09:31,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:31,188 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,350 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:09:31,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_722 vanished before elimination [2021-03-10 22:09:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:31,357 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,519 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:09:31,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,519 INFO L518 ElimStorePlain]: Eliminatee v_prenex_721 vanished before elimination [2021-03-10 22:09:31,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:31,525 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,689 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-10 22:09:31,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:31,695 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,852 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:09:31,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:31,858 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:32,014 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:09:32,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:32,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_726 vanished before elimination [2021-03-10 22:09:32,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-03-10 22:09:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:32,020 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:32,176 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:09:32,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:32,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:32,182 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:32,332 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:09:32,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:32,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_729 vanished before elimination [2021-03-10 22:09:32,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_730 vanished before elimination [2021-03-10 22:09:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:32,338 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:32,486 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:09:32,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:32,491 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:32,636 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:09:32,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:32,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 32 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:09:32,639 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 36 variables, input treesize:1947, output treesize:227 [2021-03-10 22:09:32,798 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:09:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:09:33,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493510453] [2021-03-10 22:09:33,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:33,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:33,088 INFO L87 Difference]: Start difference. First operand 916 states and 3283 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:33,497 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:09:33,755 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 22:09:34,113 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-10 22:09:34,564 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-03-10 22:09:34,850 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-03-10 22:09:35,270 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-03-10 22:09:35,654 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-03-10 22:09:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:35,695 INFO L93 Difference]: Finished difference Result 1360 states and 4518 transitions. [2021-03-10 22:09:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:09:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:35,697 INFO L225 Difference]: With dead ends: 1360 [2021-03-10 22:09:35,697 INFO L226 Difference]: Without dead ends: 1255 [2021-03-10 22:09:35,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3093.4ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:09:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-03-10 22:09:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 926. [2021-03-10 22:09:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.5870270270270272) internal successors, (3318), 925 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3318 transitions. [2021-03-10 22:09:35,709 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3318 transitions. Word has length 20 [2021-03-10 22:09:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:35,709 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3318 transitions. [2021-03-10 22:09:35,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3318 transitions. [2021-03-10 22:09:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:35,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:35,710 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:35,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-03-10 22:09:35,911 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1066698872, now seen corresponding path program 65 times [2021-03-10 22:09:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:35,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704957148] [2021-03-10 22:09:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:36,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704957148] [2021-03-10 22:09:36,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977949057] [2021-03-10 22:09:36,187 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:36,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:09:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:09:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:36,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:36,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:09:36,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206732200] [2021-03-10 22:09:36,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:09:36,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:09:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:36,758 INFO L87 Difference]: Start difference. First operand 926 states and 3318 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:36,996 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:09:37,166 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 22:09:37,559 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-10 22:09:37,773 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 22:09:37,992 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-03-10 22:09:38,164 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-03-10 22:09:38,347 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-03-10 22:09:38,517 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-03-10 22:09:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:38,538 INFO L93 Difference]: Finished difference Result 1156 states and 3915 transitions. [2021-03-10 22:09:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:38,541 INFO L225 Difference]: With dead ends: 1156 [2021-03-10 22:09:38,541 INFO L226 Difference]: Without dead ends: 1081 [2021-03-10 22:09:38,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2047.7ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:09:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-03-10 22:09:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 936. [2021-03-10 22:09:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.593582887700535) internal successors, (3360), 935 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3360 transitions. [2021-03-10 22:09:38,552 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3360 transitions. Word has length 20 [2021-03-10 22:09:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:38,552 INFO L480 AbstractCegarLoop]: Abstraction has 936 states and 3360 transitions. [2021-03-10 22:09:38,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3360 transitions. [2021-03-10 22:09:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:38,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:38,554 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:38,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10596 [2021-03-10 22:09:38,754 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1773524372, now seen corresponding path program 66 times [2021-03-10 22:09:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:38,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781952136] [2021-03-10 22:09:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781952136] [2021-03-10 22:09:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092493839] [2021-03-10 22:09:39,023 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:39,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:09:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:39,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:39,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:39,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:39,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:39,313 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:39,318 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,324 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:39,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,636 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-03-10 22:09:39,636 INFO L628 ElimStorePlain]: treesize reduction 73, result has 79.6 percent of original size [2021-03-10 22:09:39,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 9 xjuncts. [2021-03-10 22:09:39,640 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 2 variables, input treesize:487, output treesize:285 [2021-03-10 22:09:39,935 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-03-10 22:09:40,117 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:09:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:41,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:41,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:41,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:41,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,786 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 105 [2021-03-10 22:09:41,787 INFO L628 ElimStorePlain]: treesize reduction 1273, result has 21.9 percent of original size [2021-03-10 22:09:41,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:41,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,993 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:09:41,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:42,000 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,354 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-03-10 22:09:42,354 INFO L628 ElimStorePlain]: treesize reduction 39, result has 88.8 percent of original size [2021-03-10 22:09:42,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:42,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,533 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:09:42,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:42,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,709 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:09:42,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:42,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:42,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:42,884 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:09:42,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:42,891 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,059 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:09:43,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:43,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,234 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:09:43,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:43,241 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,403 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:09:43,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:43,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,569 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:09:43,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:43,576 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,736 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:09:43,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:43,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,897 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:09:43,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:43,902 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,053 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:09:44,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:44,059 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,210 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:09:44,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:44,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-10 22:09:44,213 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 16 variables, input treesize:1723, output treesize:243 [2021-03-10 22:09:44,493 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 22:09:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:44,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:44,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:09:44,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211722537] [2021-03-10 22:09:44,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:44,812 INFO L87 Difference]: Start difference. First operand 936 states and 3360 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,188 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-03-10 22:09:45,689 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2021-03-10 22:09:46,294 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-03-10 22:09:46,731 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 90 [2021-03-10 22:09:47,186 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-03-10 22:09:47,756 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-03-10 22:09:48,153 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 85 [2021-03-10 22:09:48,629 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2021-03-10 22:09:49,038 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2021-03-10 22:09:49,637 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-03-10 22:09:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:49,638 INFO L93 Difference]: Finished difference Result 1307 states and 4438 transitions. [2021-03-10 22:09:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:49,640 INFO L225 Difference]: With dead ends: 1307 [2021-03-10 22:09:49,640 INFO L226 Difference]: Without dead ends: 1247 [2021-03-10 22:09:49,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5540.5ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:09:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-03-10 22:09:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 947. [2021-03-10 22:09:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.5993657505285412) internal successors, (3405), 946 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3405 transitions. [2021-03-10 22:09:49,651 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3405 transitions. Word has length 20 [2021-03-10 22:09:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:49,651 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 3405 transitions. [2021-03-10 22:09:49,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3405 transitions. [2021-03-10 22:09:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:49,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:49,653 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:49,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10617 [2021-03-10 22:09:49,854 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1561368754, now seen corresponding path program 67 times [2021-03-10 22:09:49,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:49,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050338867] [2021-03-10 22:09:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050338867] [2021-03-10 22:09:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683370902] [2021-03-10 22:09:50,187 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:09:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:50,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:50,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:50,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:50,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:50,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:50,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:50,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:50,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,736 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:09:50,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 8 xjuncts. [2021-03-10 22:09:50,740 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:355, output treesize:315 [2021-03-10 22:09:50,939 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:09:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:52,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:52,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:52,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:52,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:09:52,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:52,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:52,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:52,946 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 112 [2021-03-10 22:09:52,947 INFO L628 ElimStorePlain]: treesize reduction 1128, result has 22.0 percent of original size [2021-03-10 22:09:52,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:52,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,140 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:09:53,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:53,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_778 vanished before elimination [2021-03-10 22:09:53,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:53,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,323 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 22:09:53,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:53,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:53,330 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,504 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:09:53,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:53,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,686 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:09:53,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:53,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,864 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 22:09:53,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:53,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:53,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,043 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:09:54,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_762 vanished before elimination [2021-03-10 22:09:54,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:54,050 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,219 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 22:09:54,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,219 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-03-10 22:09:54,219 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-03-10 22:09:54,219 INFO L518 ElimStorePlain]: Eliminatee v_prenex_786 vanished before elimination [2021-03-10 22:09:54,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_763 vanished before elimination [2021-03-10 22:09:54,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_785 vanished before elimination [2021-03-10 22:09:54,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-03-10 22:09:54,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_765 vanished before elimination [2021-03-10 22:09:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:54,226 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,392 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:09:54,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:54,399 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,563 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:09:54,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,563 INFO L518 ElimStorePlain]: Eliminatee v_prenex_768 vanished before elimination [2021-03-10 22:09:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:54,569 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,736 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:09:54,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_767 vanished before elimination [2021-03-10 22:09:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:54,742 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:54,899 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:09:54,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:54,900 INFO L518 ElimStorePlain]: Eliminatee v_prenex_771 vanished before elimination [2021-03-10 22:09:54,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:54,906 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:55,062 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:09:55,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:55,068 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:55,222 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:09:55,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:55,222 INFO L518 ElimStorePlain]: Eliminatee v_prenex_772 vanished before elimination [2021-03-10 22:09:55,222 INFO L518 ElimStorePlain]: Eliminatee v_prenex_775 vanished before elimination [2021-03-10 22:09:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:55,228 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:55,381 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:09:55,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:55,381 INFO L518 ElimStorePlain]: Eliminatee v_prenex_777 vanished before elimination [2021-03-10 22:09:55,381 INFO L518 ElimStorePlain]: Eliminatee v_prenex_776 vanished before elimination [2021-03-10 22:09:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:55,387 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:55,540 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:09:55,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:55,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 32 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:09:55,543 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 36 variables, input treesize:1545, output treesize:231 [2021-03-10 22:09:55,708 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:09:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:56,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:09:56,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656672943] [2021-03-10 22:09:56,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:56,010 INFO L87 Difference]: Start difference. First operand 947 states and 3405 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,675 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 22:09:58,099 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-03-10 22:09:58,498 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-10 22:09:59,031 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-03-10 22:09:59,506 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-03-10 22:09:59,846 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-03-10 22:09:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:59,857 INFO L93 Difference]: Finished difference Result 1440 states and 4808 transitions. [2021-03-10 22:09:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:09:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:09:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:59,860 INFO L225 Difference]: With dead ends: 1440 [2021-03-10 22:09:59,860 INFO L226 Difference]: Without dead ends: 1365 [2021-03-10 22:09:59,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 4134.6ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:09:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-03-10 22:09:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 952. [2021-03-10 22:09:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.601472134595163) internal successors, (3425), 951 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3425 transitions. [2021-03-10 22:09:59,871 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3425 transitions. Word has length 20 [2021-03-10 22:09:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:59,871 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 3425 transitions. [2021-03-10 22:09:59,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3425 transitions. [2021-03-10 22:09:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:09:59,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:59,873 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:00,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10803,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:00,073 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -128574150, now seen corresponding path program 68 times [2021-03-10 22:10:00,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:00,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354894071] [2021-03-10 22:10:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:00,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354894071] [2021-03-10 22:10:00,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208198057] [2021-03-10 22:10:00,343 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:00,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:00,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:10:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:00,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:00,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:10:00,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:00,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:00,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:00,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:00,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:00,644 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:00,648 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:00,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:00,659 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:00,664 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:00,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:00,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:00,683 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:00,690 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:00,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:00,697 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:00,937 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:10:00,938 INFO L628 ElimStorePlain]: treesize reduction 147, result has 56.4 percent of original size [2021-03-10 22:10:00,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:10:00,939 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:714, output treesize:190 [2021-03-10 22:10:01,060 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 22:10:01,405 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_792], 1=[ends_with_6, v_prenex_791], 3=[ends_with_2], 6=[v_prenex_794], 10=[v_prenex_793]} [2021-03-10 22:10:01,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:01,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:01,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:01,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:01,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:01,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:01,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,958 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-03-10 22:10:01,959 INFO L628 ElimStorePlain]: treesize reduction 516, result has 41.6 percent of original size [2021-03-10 22:10:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:01,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:01,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,180 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:10:02,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:02,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:02,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:02,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,406 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:10:02,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:02,413 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:02,418 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,624 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:10:02,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:02,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:02,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:02,638 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:02,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:02,653 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:02,659 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:02,666 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,020 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-03-10 22:10:03,020 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.4 percent of original size [2021-03-10 22:10:03,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:03,026 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:03,032 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:03,038 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:03,051 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:03,056 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:03,061 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:03,368 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 22:10:03,368 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-03-10 22:10:03,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:10:03,370 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 7 variables, input treesize:1068, output treesize:250 [2021-03-10 22:10:03,593 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 22:10:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:03,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:03,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535613709] [2021-03-10 22:10:03,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:03,937 INFO L87 Difference]: Start difference. First operand 952 states and 3425 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,289 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-03-10 22:10:04,495 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2021-03-10 22:10:04,811 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 22:10:05,135 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 22:10:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:05,167 INFO L93 Difference]: Finished difference Result 1053 states and 3714 transitions. [2021-03-10 22:10:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:05,169 INFO L225 Difference]: With dead ends: 1053 [2021-03-10 22:10:05,169 INFO L226 Difference]: Without dead ends: 1038 [2021-03-10 22:10:05,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1804.1ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-03-10 22:10:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 950. [2021-03-10 22:10:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.6037934668071654) internal successors, (3420), 949 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3420 transitions. [2021-03-10 22:10:05,179 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3420 transitions. Word has length 20 [2021-03-10 22:10:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:05,179 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 3420 transitions. [2021-03-10 22:10:05,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3420 transitions. [2021-03-10 22:10:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:05,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:05,181 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:05,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11070,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,381 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 69 times [2021-03-10 22:10:05,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:05,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420265638] [2021-03-10 22:10:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:05,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420265638] [2021-03-10 22:10:05,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347444291] [2021-03-10 22:10:05,630 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:05,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:10:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:06,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:06,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:06,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100807685] [2021-03-10 22:10:06,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:06,194 INFO L87 Difference]: Start difference. First operand 950 states and 3420 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,757 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:10:07,152 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:10:07,344 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-03-10 22:10:07,551 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 22:10:07,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 22:10:07,851 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-10 22:10:08,140 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:10:08,473 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-03-10 22:10:08,753 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 22:10:08,920 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 22:10:09,137 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 22:10:09,461 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-10 22:10:09,765 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 22:10:09,939 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 22:10:10,243 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 22:10:10,472 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 22:10:10,866 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-03-10 22:10:11,024 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 22:10:11,333 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-03-10 22:10:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:11,368 INFO L93 Difference]: Finished difference Result 1626 states and 5397 transitions. [2021-03-10 22:10:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:10:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:11,372 INFO L225 Difference]: With dead ends: 1626 [2021-03-10 22:10:11,372 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 22:10:11,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 5221.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1683, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:10:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 22:10:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 964. [2021-03-10 22:10:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.5908618899273104) internal successors, (3458), 963 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3458 transitions. [2021-03-10 22:10:11,385 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3458 transitions. Word has length 20 [2021-03-10 22:10:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:11,385 INFO L480 AbstractCegarLoop]: Abstraction has 964 states and 3458 transitions. [2021-03-10 22:10:11,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3458 transitions. [2021-03-10 22:10:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:11,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:11,386 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:11,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11177,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:11,589 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 70 times [2021-03-10 22:10:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:11,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359896722] [2021-03-10 22:10:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:11,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359896722] [2021-03-10 22:10:11,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443558440] [2021-03-10 22:10:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:11,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:11,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:10:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:12,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:12,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:12,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784669665] [2021-03-10 22:10:12,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:12,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:12,451 INFO L87 Difference]: Start difference. First operand 964 states and 3458 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,842 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 22:10:12,974 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 22:10:13,299 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 22:10:13,507 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-10 22:10:13,754 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 22:10:14,045 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 22:10:14,326 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 22:10:14,558 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 22:10:14,697 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:10:14,916 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 22:10:15,076 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 22:10:15,352 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:10:15,687 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 22:10:15,895 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:10:16,219 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 22:10:16,547 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-03-10 22:10:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:16,591 INFO L93 Difference]: Finished difference Result 1695 states and 5757 transitions. [2021-03-10 22:10:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:10:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:16,594 INFO L225 Difference]: With dead ends: 1695 [2021-03-10 22:10:16,594 INFO L226 Difference]: Without dead ends: 1635 [2021-03-10 22:10:16,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 4228.4ms TimeCoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:10:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-03-10 22:10:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 971. [2021-03-10 22:10:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.588659793814433) internal successors, (3481), 970 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3481 transitions. [2021-03-10 22:10:16,608 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3481 transitions. Word has length 20 [2021-03-10 22:10:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:16,608 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 3481 transitions. [2021-03-10 22:10:16,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3481 transitions. [2021-03-10 22:10:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:16,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:16,609 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:16,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11198,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:16,811 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash -555887772, now seen corresponding path program 71 times [2021-03-10 22:10:16,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:16,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667691644] [2021-03-10 22:10:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667691644] [2021-03-10 22:10:17,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857106694] [2021-03-10 22:10:17,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:17,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:10:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:17,437 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:10:17,631 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:10:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:17,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:10:17,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94967323] [2021-03-10 22:10:17,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:10:17,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:10:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:17,773 INFO L87 Difference]: Start difference. First operand 971 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,347 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:10:18,580 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 22:10:18,814 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:10:19,188 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-10 22:10:19,395 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-10 22:10:19,575 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-03-10 22:10:19,782 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-10 22:10:20,039 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 22:10:20,238 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-10 22:10:20,583 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 22:10:20,793 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-03-10 22:10:21,016 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 22:10:21,425 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-03-10 22:10:21,712 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 22:10:21,965 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 22:10:22,263 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-10 22:10:22,673 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-10 22:10:22,938 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-10 22:10:23,311 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-10 22:10:23,579 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-03-10 22:10:23,985 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-03-10 22:10:24,116 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 22:10:24,534 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-03-10 22:10:24,937 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-10 22:10:25,082 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 22:10:25,474 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-03-10 22:10:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:25,534 INFO L93 Difference]: Finished difference Result 1681 states and 5568 transitions. [2021-03-10 22:10:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:10:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:25,537 INFO L225 Difference]: With dead ends: 1681 [2021-03-10 22:10:25,537 INFO L226 Difference]: Without dead ends: 1636 [2021-03-10 22:10:25,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 7555.0ms TimeCoverageRelationStatistics Valid=597, Invalid=2825, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 22:10:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-03-10 22:10:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 971. [2021-03-10 22:10:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.588659793814433) internal successors, (3481), 970 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3481 transitions. [2021-03-10 22:10:25,550 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3481 transitions. Word has length 20 [2021-03-10 22:10:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:25,550 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 3481 transitions. [2021-03-10 22:10:25,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3481 transitions. [2021-03-10 22:10:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:25,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:25,552 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:25,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11219,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:25,752 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1896142186, now seen corresponding path program 72 times [2021-03-10 22:10:25,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:25,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716017273] [2021-03-10 22:10:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716017273] [2021-03-10 22:10:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630096410] [2021-03-10 22:10:25,972 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:26,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:26,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:10:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:26,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:26,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942554461] [2021-03-10 22:10:26,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:26,590 INFO L87 Difference]: Start difference. First operand 971 states and 3481 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,713 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:10:26,855 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 22:10:27,635 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 22:10:27,982 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-03-10 22:10:28,324 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-03-10 22:10:28,560 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-10 22:10:28,885 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-03-10 22:10:29,269 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-03-10 22:10:29,510 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 22:10:29,757 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-03-10 22:10:30,110 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-03-10 22:10:30,357 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-10 22:10:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:30,420 INFO L93 Difference]: Finished difference Result 1776 states and 5871 transitions. [2021-03-10 22:10:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:10:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:30,423 INFO L225 Difference]: With dead ends: 1776 [2021-03-10 22:10:30,423 INFO L226 Difference]: Without dead ends: 1701 [2021-03-10 22:10:30,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 3919.8ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:10:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-03-10 22:10:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 988. [2021-03-10 22:10:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.5937183383991895) internal successors, (3547), 987 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3547 transitions. [2021-03-10 22:10:30,437 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3547 transitions. Word has length 20 [2021-03-10 22:10:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:30,437 INFO L480 AbstractCegarLoop]: Abstraction has 988 states and 3547 transitions. [2021-03-10 22:10:30,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3547 transitions. [2021-03-10 22:10:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:30,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:30,439 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:30,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11241,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:30,639 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:30,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1801488452, now seen corresponding path program 73 times [2021-03-10 22:10:30,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:30,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296640784] [2021-03-10 22:10:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296640784] [2021-03-10 22:10:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109043924] [2021-03-10 22:10:30,854 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:10:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:31,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:31,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993408670] [2021-03-10 22:10:31,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:31,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:31,477 INFO L87 Difference]: Start difference. First operand 988 states and 3547 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,192 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:10:32,348 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-10 22:10:32,528 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 22:10:32,782 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 22:10:33,034 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-03-10 22:10:33,246 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-10 22:10:33,387 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-10 22:10:33,671 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 22:10:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:33,831 INFO L93 Difference]: Finished difference Result 1598 states and 5325 transitions. [2021-03-10 22:10:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:33,833 INFO L225 Difference]: With dead ends: 1598 [2021-03-10 22:10:33,833 INFO L226 Difference]: Without dead ends: 1523 [2021-03-10 22:10:33,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2394.6ms TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:10:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-03-10 22:10:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1005. [2021-03-10 22:10:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.6075697211155378) internal successors, (3622), 1004 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3622 transitions. [2021-03-10 22:10:33,847 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3622 transitions. Word has length 20 [2021-03-10 22:10:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:33,847 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 3622 transitions. [2021-03-10 22:10:33,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3622 transitions. [2021-03-10 22:10:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:33,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:33,848 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:34,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11263,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,049 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash -625997808, now seen corresponding path program 74 times [2021-03-10 22:10:34,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:34,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419066415] [2021-03-10 22:10:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419066415] [2021-03-10 22:10:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127647958] [2021-03-10 22:10:34,264 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:10:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:34,665 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:10:34,859 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:10:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68639876] [2021-03-10 22:10:35,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:35,005 INFO L87 Difference]: Start difference. First operand 1005 states and 3622 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:35,588 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 22:10:36,015 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 22:10:36,308 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-03-10 22:10:36,669 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-10 22:10:37,155 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-10 22:10:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:37,203 INFO L93 Difference]: Finished difference Result 1517 states and 5130 transitions. [2021-03-10 22:10:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:37,206 INFO L225 Difference]: With dead ends: 1517 [2021-03-10 22:10:37,206 INFO L226 Difference]: Without dead ends: 1457 [2021-03-10 22:10:37,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2527.3ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:10:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-03-10 22:10:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1013. [2021-03-10 22:10:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.6146245059288535) internal successors, (3658), 1012 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3658 transitions. [2021-03-10 22:10:37,218 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3658 transitions. Word has length 20 [2021-03-10 22:10:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:37,218 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3658 transitions. [2021-03-10 22:10:37,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3658 transitions. [2021-03-10 22:10:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:37,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:37,220 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:37,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11281,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,420 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash -457736914, now seen corresponding path program 75 times [2021-03-10 22:10:37,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983845059] [2021-03-10 22:10:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983845059] [2021-03-10 22:10:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399206473] [2021-03-10 22:10:37,637 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:10:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:38,015 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:10:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:38,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:38,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000269236] [2021-03-10 22:10:38,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:38,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:38,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:38,352 INFO L87 Difference]: Start difference. First operand 1013 states and 3658 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,790 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:10:39,459 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 22:10:39,607 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-10 22:10:39,799 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 22:10:40,141 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 22:10:40,275 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:10:40,544 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-03-10 22:10:40,964 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-10 22:10:41,128 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-10 22:10:41,393 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-03-10 22:10:41,820 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-03-10 22:10:42,322 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2021-03-10 22:10:42,502 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 22:10:42,916 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-03-10 22:10:43,204 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-03-10 22:10:43,693 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-03-10 22:10:43,871 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:10:44,279 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-10 22:10:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:44,363 INFO L93 Difference]: Finished difference Result 1880 states and 6414 transitions. [2021-03-10 22:10:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:10:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:44,367 INFO L225 Difference]: With dead ends: 1880 [2021-03-10 22:10:44,367 INFO L226 Difference]: Without dead ends: 1850 [2021-03-10 22:10:44,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 6038.0ms TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:10:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2021-03-10 22:10:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1018. [2021-03-10 22:10:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.6155358898721732) internal successors, (3677), 1017 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3677 transitions. [2021-03-10 22:10:44,381 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3677 transitions. Word has length 20 [2021-03-10 22:10:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:44,381 INFO L480 AbstractCegarLoop]: Abstraction has 1018 states and 3677 transitions. [2021-03-10 22:10:44,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3677 transitions. [2021-03-10 22:10:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:44,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:44,382 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:44,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11307,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,583 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -73024590, now seen corresponding path program 76 times [2021-03-10 22:10:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:44,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598309627] [2021-03-10 22:10:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598309627] [2021-03-10 22:10:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942432048] [2021-03-10 22:10:44,821 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:10:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:45,272 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:10:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:45,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:10:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17700147] [2021-03-10 22:10:45,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:45,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:45,585 INFO L87 Difference]: Start difference. First operand 1018 states and 3677 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,976 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:10:46,195 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:10:46,579 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 22:10:46,746 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:10:46,903 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:10:47,046 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 22:10:47,265 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-03-10 22:10:47,676 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 22:10:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:47,697 INFO L93 Difference]: Finished difference Result 1611 states and 5434 transitions. [2021-03-10 22:10:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:47,700 INFO L225 Difference]: With dead ends: 1611 [2021-03-10 22:10:47,700 INFO L226 Difference]: Without dead ends: 1566 [2021-03-10 22:10:47,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2472.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:10:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-03-10 22:10:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1025. [2021-03-10 22:10:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.6171875) internal successors, (3704), 1024 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3704 transitions. [2021-03-10 22:10:47,713 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3704 transitions. Word has length 20 [2021-03-10 22:10:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:47,713 INFO L480 AbstractCegarLoop]: Abstraction has 1025 states and 3704 transitions. [2021-03-10 22:10:47,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3704 transitions. [2021-03-10 22:10:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:47,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:47,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:47,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11328,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:47,915 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:47,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1863375320, now seen corresponding path program 77 times [2021-03-10 22:10:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:47,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185849156] [2021-03-10 22:10:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185849156] [2021-03-10 22:10:48,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200840523] [2021-03-10 22:10:48,149 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:48,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:10:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:48,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:10:48,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926014958] [2021-03-10 22:10:48,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:10:48,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:10:48,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:48,841 INFO L87 Difference]: Start difference. First operand 1025 states and 3704 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,208 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:10:49,528 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-10 22:10:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:49,682 INFO L93 Difference]: Finished difference Result 1434 states and 4930 transitions. [2021-03-10 22:10:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:10:49,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:49,685 INFO L225 Difference]: With dead ends: 1434 [2021-03-10 22:10:49,685 INFO L226 Difference]: Without dead ends: 1419 [2021-03-10 22:10:49,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1276.2ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-03-10 22:10:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1025. [2021-03-10 22:10:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.6171875) internal successors, (3704), 1024 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3704 transitions. [2021-03-10 22:10:49,696 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3704 transitions. Word has length 20 [2021-03-10 22:10:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:49,697 INFO L480 AbstractCegarLoop]: Abstraction has 1025 states and 3704 transitions. [2021-03-10 22:10:49,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3704 transitions. [2021-03-10 22:10:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:49,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:49,698 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:49,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11349,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:49,898 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash -157505874, now seen corresponding path program 78 times [2021-03-10 22:10:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:49,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863433316] [2021-03-10 22:10:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863433316] [2021-03-10 22:10:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596815208] [2021-03-10 22:10:50,151 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:50,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:10:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:51,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:10:51,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:10:51,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:10:51,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:10:51,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,170 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,175 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:51,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:51,188 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:51,195 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:51,201 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,206 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:51,213 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,218 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:51,224 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,229 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:51,234 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:51,240 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:51,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:10:51,246 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,485 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 22:10:51,486 INFO L628 ElimStorePlain]: treesize reduction 21, result has 89.7 percent of original size [2021-03-10 22:10:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:51,491 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:51,496 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:51,500 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:51,505 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:10:51,510 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:51,515 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:51,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:51,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:10:51,616 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 3 variables, input treesize:1005, output treesize:132 [2021-03-10 22:10:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:51,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:51,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:51,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645483997] [2021-03-10 22:10:51,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:51,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:51,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:51,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:51,884 INFO L87 Difference]: Start difference. First operand 1025 states and 3704 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,118 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:10:52,433 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:10:52,898 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 22:10:53,062 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 22:10:53,354 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-10 22:10:53,654 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-10 22:10:54,030 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 22:10:54,360 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:10:54,639 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-10 22:10:54,936 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 22:10:54,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:54,972 INFO L93 Difference]: Finished difference Result 1436 states and 4823 transitions. [2021-03-10 22:10:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:10:54,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:10:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:54,975 INFO L225 Difference]: With dead ends: 1436 [2021-03-10 22:10:54,975 INFO L226 Difference]: Without dead ends: 1361 [2021-03-10 22:10:54,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3168.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:10:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-03-10 22:10:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1029. [2021-03-10 22:10:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.6167315175097277) internal successors, (3718), 1028 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3718 transitions. [2021-03-10 22:10:54,986 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3718 transitions. Word has length 20 [2021-03-10 22:10:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:54,987 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3718 transitions. [2021-03-10 22:10:54,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3718 transitions. [2021-03-10 22:10:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:10:54,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:54,988 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:55,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11368 [2021-03-10 22:10:55,188 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1017984770, now seen corresponding path program 79 times [2021-03-10 22:10:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:55,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821226796] [2021-03-10 22:10:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821226796] [2021-03-10 22:10:55,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885782131] [2021-03-10 22:10:55,423 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:10:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:10:56,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:10:56,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:56,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:10:56,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:56,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:56,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:56,096 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:10:56,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:56,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:56,114 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:10:56,124 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:56,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,244 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:10:56,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:56,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 6 xjuncts. [2021-03-10 22:10:56,248 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:473, output treesize:189 [2021-03-10 22:10:56,381 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:10:57,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:57,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:10:57,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:10:57,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,470 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-03-10 22:10:57,471 INFO L628 ElimStorePlain]: treesize reduction 190, result has 47.9 percent of original size [2021-03-10 22:10:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:57,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,582 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:10:57,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:57,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,691 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 22:10:57,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:57,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,799 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:10:57,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:57,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:57,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:57,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:10:57,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:58,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:58,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:10:58,007 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 9 variables, input treesize:407, output treesize:132 [2021-03-10 22:10:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:58,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091798093] [2021-03-10 22:10:58,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:58,277 INFO L87 Difference]: Start difference. First operand 1029 states and 3718 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,665 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:10:58,807 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 22:10:58,960 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 22:10:59,781 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 22:11:00,061 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:11:00,348 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-10 22:11:00,640 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 22:11:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:00,655 INFO L93 Difference]: Finished difference Result 1389 states and 4731 transitions. [2021-03-10 22:11:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:11:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:00,657 INFO L225 Difference]: With dead ends: 1389 [2021-03-10 22:11:00,657 INFO L226 Difference]: Without dead ends: 1329 [2021-03-10 22:11:00,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2640.4ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:11:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-10 22:11:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1035. [2021-03-10 22:11:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 3.613152804642166) internal successors, (3736), 1034 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3736 transitions. [2021-03-10 22:11:00,669 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3736 transitions. Word has length 20 [2021-03-10 22:11:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:00,669 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 3736 transitions. [2021-03-10 22:11:00,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3736 transitions. [2021-03-10 22:11:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:00,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:00,670 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:00,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11579 [2021-03-10 22:11:00,871 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1832315252, now seen corresponding path program 80 times [2021-03-10 22:11:00,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:00,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677277138] [2021-03-10 22:11:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677277138] [2021-03-10 22:11:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274494133] [2021-03-10 22:11:01,355 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:01,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:01,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:03,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:03,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:03,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:03,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:03,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:03,071 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,081 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:03,088 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:03,095 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,100 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,105 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:03,112 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:03,119 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,124 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:03,130 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:03,137 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:03,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:03,143 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,148 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,153 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:03,158 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,403 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 22:11:03,404 INFO L628 ElimStorePlain]: treesize reduction 21, result has 89.7 percent of original size [2021-03-10 22:11:03,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:03,409 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:03,414 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:03,419 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:03,424 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:03,428 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:03,433 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,533 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:11:03,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:03,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:11:03,536 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 3 variables, input treesize:1005, output treesize:132 [2021-03-10 22:11:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:03,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:03,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646238670] [2021-03-10 22:11:03,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:03,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:03,811 INFO L87 Difference]: Start difference. First operand 1035 states and 3736 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:04,550 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 22:11:05,171 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:11:05,468 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 22:11:05,691 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:11:05,852 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:11:06,180 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:11:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:06,230 INFO L93 Difference]: Finished difference Result 1530 states and 5097 transitions. [2021-03-10 22:11:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:11:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:06,233 INFO L225 Difference]: With dead ends: 1530 [2021-03-10 22:11:06,233 INFO L226 Difference]: Without dead ends: 1470 [2021-03-10 22:11:06,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2659.8ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:11:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-03-10 22:11:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1049. [2021-03-10 22:11:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.6192748091603053) internal successors, (3793), 1048 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3793 transitions. [2021-03-10 22:11:06,245 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3793 transitions. Word has length 20 [2021-03-10 22:11:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:06,245 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3793 transitions. [2021-03-10 22:11:06,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3793 transitions. [2021-03-10 22:11:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:06,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:06,246 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:06,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11914 [2021-03-10 22:11:06,448 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1612649706, now seen corresponding path program 81 times [2021-03-10 22:11:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:06,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515260278] [2021-03-10 22:11:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515260278] [2021-03-10 22:11:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118027867] [2021-03-10 22:11:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:06,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:08,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:08,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:08,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:08,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:08,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:08,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:08,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:08,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:08,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:08,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:09,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,024 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,033 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,040 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,049 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,058 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,065 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,073 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,104 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:09,114 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,120 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,127 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,133 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,139 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,146 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,154 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,160 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,167 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,173 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:09,181 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,187 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:09,196 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:09,204 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:09,212 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,218 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,224 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,231 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,239 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,246 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:09,254 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,260 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,268 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:09,276 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:09,284 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:09,291 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,299 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,304 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,310 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:09,317 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:09,324 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:09,330 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,793 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-03-10 22:11:09,794 INFO L628 ElimStorePlain]: treesize reduction 148, result has 69.5 percent of original size [2021-03-10 22:11:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:09,800 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:09,805 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:09,811 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:09,816 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:09,822 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:09,828 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:09,834 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:09,839 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:09,845 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:09,850 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:10,039 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 22:11:10,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:10,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:11:10,042 INFO L247 ElimStorePlain]: Needed 61 recursive calls to eliminate 3 variables, input treesize:2276, output treesize:257 [2021-03-10 22:11:10,346 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:11:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:10,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:10,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426157374] [2021-03-10 22:11:10,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:10,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:10,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:10,646 INFO L87 Difference]: Start difference. First operand 1049 states and 3793 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,427 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 22:11:11,661 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 22:11:12,286 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 22:11:12,653 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-03-10 22:11:13,010 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 22:11:13,612 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-10 22:11:13,968 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-03-10 22:11:14,363 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-03-10 22:11:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:14,490 INFO L93 Difference]: Finished difference Result 1599 states and 5280 transitions. [2021-03-10 22:11:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:11:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:14,492 INFO L225 Difference]: With dead ends: 1599 [2021-03-10 22:11:14,492 INFO L226 Difference]: Without dead ends: 1494 [2021-03-10 22:11:14,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4108.4ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:11:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-03-10 22:11:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1047. [2021-03-10 22:11:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.621414913957935) internal successors, (3788), 1046 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3788 transitions. [2021-03-10 22:11:14,505 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3788 transitions. Word has length 20 [2021-03-10 22:11:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:14,506 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3788 transitions. [2021-03-10 22:11:14,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3788 transitions. [2021-03-10 22:11:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:14,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:14,507 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:14,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12403 [2021-03-10 22:11:14,721 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1682759742, now seen corresponding path program 82 times [2021-03-10 22:11:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:14,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987006068] [2021-03-10 22:11:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987006068] [2021-03-10 22:11:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254360364] [2021-03-10 22:11:15,010 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:15,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:15,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:15,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:15,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:15,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:15,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:15,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:15,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:15,565 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:15,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:15,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:15,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:15,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:15,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:15,604 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:15,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:15,618 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:15,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:15,624 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:15,808 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:11:15,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:15,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:11:15,812 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:281 [2021-03-10 22:11:16,028 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:11:17,709 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_809, v_prenex_819, v_prenex_808, ends_with_2, ends_with_6, v_prenex_823, v_prenex_812, v_prenex_811, v_prenex_814, v_prenex_813, v_prenex_827, v_prenex_805, v_prenex_826, v_prenex_815, v_prenex_807, v_prenex_829, v_prenex_806, v_prenex_810], 21=[v_prenex_824]} [2021-03-10 22:11:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:17,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:11:17,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,206 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 96 [2021-03-10 22:11:18,207 INFO L628 ElimStorePlain]: treesize reduction 807, result has 26.3 percent of original size [2021-03-10 22:11:18,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_819 vanished before elimination [2021-03-10 22:11:18,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-03-10 22:11:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:18,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:18,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,409 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:11:18,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:18,410 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-03-10 22:11:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:18,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:18,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,606 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:11:18,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:18,606 INFO L518 ElimStorePlain]: Eliminatee v_prenex_812 vanished before elimination [2021-03-10 22:11:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:18,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,792 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:11:18,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:18,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:18,799 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,980 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:11:18,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:18,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:18,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:19,163 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:11:19,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:19,169 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:19,346 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:11:19,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:19,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_805 vanished before elimination [2021-03-10 22:11:19,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_826 vanished before elimination [2021-03-10 22:11:19,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_815 vanished before elimination [2021-03-10 22:11:19,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_807 vanished before elimination [2021-03-10 22:11:19,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:19,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:19,531 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:11:19,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:19,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_806 vanished before elimination [2021-03-10 22:11:19,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_810 vanished before elimination [2021-03-10 22:11:19,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:19,537 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:19,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:19,542 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:19,711 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:11:19,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:19,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 19 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:11:19,714 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 31 variables, input treesize:1105, output treesize:209 [2021-03-10 22:11:19,888 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 22:11:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:20,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:20,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541547728] [2021-03-10 22:11:20,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:20,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:20,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:20,193 INFO L87 Difference]: Start difference. First operand 1047 states and 3788 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,396 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 22:11:21,779 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-10 22:11:21,987 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-10 22:11:22,323 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 22:11:22,655 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-03-10 22:11:22,920 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-03-10 22:11:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:22,942 INFO L93 Difference]: Finished difference Result 1408 states and 4825 transitions. [2021-03-10 22:11:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:11:22,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:22,945 INFO L225 Difference]: With dead ends: 1408 [2021-03-10 22:11:22,945 INFO L226 Difference]: Without dead ends: 1348 [2021-03-10 22:11:22,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3245.4ms TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:11:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-03-10 22:11:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1049. [2021-03-10 22:11:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.62118320610687) internal successors, (3795), 1048 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3795 transitions. [2021-03-10 22:11:22,957 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3795 transitions. Word has length 20 [2021-03-10 22:11:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:22,957 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3795 transitions. [2021-03-10 22:11:22,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3795 transitions. [2021-03-10 22:11:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:22,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:22,958 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:23,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13143 [2021-03-10 22:11:23,158 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1969149776, now seen corresponding path program 83 times [2021-03-10 22:11:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:23,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975496951] [2021-03-10 22:11:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975496951] [2021-03-10 22:11:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812151738] [2021-03-10 22:11:23,530 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:24,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:24,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:11:24,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019327912] [2021-03-10 22:11:24,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:11:24,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:11:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:24,211 INFO L87 Difference]: Start difference. First operand 1049 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,806 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 22:11:25,058 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 22:11:25,372 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 22:11:25,716 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 22:11:25,959 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-03-10 22:11:26,188 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:11:26,379 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 22:11:26,576 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2021-03-10 22:11:26,881 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-10 22:11:27,025 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:11:27,291 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:11:27,455 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:11:27,800 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 22:11:27,998 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-10 22:11:28,304 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-10 22:11:28,434 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:11:28,819 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-03-10 22:11:29,016 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-03-10 22:11:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:29,070 INFO L93 Difference]: Finished difference Result 1786 states and 6070 transitions. [2021-03-10 22:11:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:11:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:29,073 INFO L225 Difference]: With dead ends: 1786 [2021-03-10 22:11:29,073 INFO L226 Difference]: Without dead ends: 1726 [2021-03-10 22:11:29,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4924.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:11:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-03-10 22:11:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1078. [2021-03-10 22:11:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.6193129062209843) internal successors, (3898), 1077 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3898 transitions. [2021-03-10 22:11:29,088 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3898 transitions. Word has length 20 [2021-03-10 22:11:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:29,088 INFO L480 AbstractCegarLoop]: Abstraction has 1078 states and 3898 transitions. [2021-03-10 22:11:29,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3898 transitions. [2021-03-10 22:11:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:29,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:29,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:29,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13351,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:29,290 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:29,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1115280876, now seen corresponding path program 84 times [2021-03-10 22:11:29,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:29,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384578378] [2021-03-10 22:11:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384578378] [2021-03-10 22:11:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309273268] [2021-03-10 22:11:29,586 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:29,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:30,043 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:11:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:30,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:30,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:30,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:30,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:30,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,857 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 7 treesize of output 1 [2021-03-10 22:11:30,859 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:30,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,878 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,883 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,889 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,900 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,905 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,910 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,915 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:30,923 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,928 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:30,935 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:30,942 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:30,949 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,954 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,959 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:30,966 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:30,972 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:30,979 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,275 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 22:11:31,276 INFO L628 ElimStorePlain]: treesize reduction 28, result has 88.4 percent of original size [2021-03-10 22:11:31,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:31,282 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:31,287 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:31,292 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:31,298 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:31,303 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:31,308 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:31,314 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,431 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:11:31,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:31,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:11:31,433 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 3 variables, input treesize:1282, output treesize:156 [2021-03-10 22:11:31,633 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:11:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:31,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:31,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:31,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454565896] [2021-03-10 22:11:31,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:31,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:31,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:31,811 INFO L87 Difference]: Start difference. First operand 1078 states and 3898 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,951 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 22:11:32,201 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 22:11:32,602 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 22:11:33,597 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-03-10 22:11:33,845 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-10 22:11:34,120 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 22:11:34,400 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:11:34,736 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:11:35,029 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 22:11:35,300 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 22:11:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:35,358 INFO L93 Difference]: Finished difference Result 1487 states and 5022 transitions. [2021-03-10 22:11:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:11:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:35,360 INFO L225 Difference]: With dead ends: 1487 [2021-03-10 22:11:35,360 INFO L226 Difference]: Without dead ends: 1412 [2021-03-10 22:11:35,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3848.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:11:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-03-10 22:11:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1088. [2021-03-10 22:11:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.6200551977920883) internal successors, (3935), 1087 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3935 transitions. [2021-03-10 22:11:35,373 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3935 transitions. Word has length 20 [2021-03-10 22:11:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:35,373 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 3935 transitions. [2021-03-10 22:11:35,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3935 transitions. [2021-03-10 22:11:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:35,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:35,374 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:35,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13372,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:35,575 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1072902300, now seen corresponding path program 85 times [2021-03-10 22:11:35,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:35,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785997107] [2021-03-10 22:11:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785997107] [2021-03-10 22:11:35,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973910056] [2021-03-10 22:11:35,941 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:36,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:36,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:36,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:36,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:36,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:36,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:36,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:36,499 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:36,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:36,512 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:36,518 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:36,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:36,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:36,537 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:36,543 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,689 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:11:36,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:36,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 7 xjuncts. [2021-03-10 22:11:36,693 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:597, output treesize:222 [2021-03-10 22:11:36,940 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-03-10 22:11:38,046 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_2, v_prenex_832, v_prenex_843, ends_with_6, v_prenex_845, v_prenex_836, v_prenex_835, v_prenex_839], 15=[v_prenex_833, v_prenex_838]} [2021-03-10 22:11:38,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:38,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,374 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2021-03-10 22:11:38,374 INFO L628 ElimStorePlain]: treesize reduction 533, result has 27.4 percent of original size [2021-03-10 22:11:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:38,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,506 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:11:38,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:38,506 INFO L518 ElimStorePlain]: Eliminatee v_prenex_843 vanished before elimination [2021-03-10 22:11:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:38,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:38,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,635 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:11:38,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:38,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,757 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:11:38,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:38,758 INFO L518 ElimStorePlain]: Eliminatee v_prenex_836 vanished before elimination [2021-03-10 22:11:38,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:38,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:11:38,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:38,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:38,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,996 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 22:11:38,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:11:39,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:39,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:39,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:39,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 22:11:39,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:39,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:39,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:39,231 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 22:11:39,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:39,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 10 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:11:39,233 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 19 variables, input treesize:765, output treesize:136 [2021-03-10 22:11:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:39,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:39,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:39,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809915811] [2021-03-10 22:11:39,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:39,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:39,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:39,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:39,526 INFO L87 Difference]: Start difference. First operand 1088 states and 3935 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,991 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:11:40,214 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 22:11:40,486 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-03-10 22:11:40,896 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-10 22:11:41,301 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:11:41,598 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 22:11:41,802 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 22:11:42,068 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:11:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:42,080 INFO L93 Difference]: Finished difference Result 1388 states and 4767 transitions. [2021-03-10 22:11:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:11:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:42,083 INFO L225 Difference]: With dead ends: 1388 [2021-03-10 22:11:42,083 INFO L226 Difference]: Without dead ends: 1343 [2021-03-10 22:11:42,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 3119.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:11:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-03-10 22:11:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1090. [2021-03-10 22:11:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.6179981634527087) internal successors, (3940), 1089 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3940 transitions. [2021-03-10 22:11:42,094 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3940 transitions. Word has length 20 [2021-03-10 22:11:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:42,095 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3940 transitions. [2021-03-10 22:11:42,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3940 transitions. [2021-03-10 22:11:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:42,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:42,096 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:42,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13637,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,296 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:42,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1293529654, now seen corresponding path program 86 times [2021-03-10 22:11:42,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:42,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449962902] [2021-03-10 22:11:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449962902] [2021-03-10 22:11:42,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796660317] [2021-03-10 22:11:42,581 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:42,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:11:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:43,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:43,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:43,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:43,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:43,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:43,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:43,798 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,804 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:43,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:43,828 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,835 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:43,843 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,849 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,854 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:43,861 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:43,869 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,875 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:43,881 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,886 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:43,894 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:43,901 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:43,908 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,914 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,919 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:43,926 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:43,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:43,933 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,938 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,943 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:43,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:43,948 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,276 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 22:11:44,276 INFO L628 ElimStorePlain]: treesize reduction 27, result has 90.3 percent of original size [2021-03-10 22:11:44,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:44,282 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,288 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,293 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:44,298 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:44,304 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,309 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:44,314 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,319 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,579 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 22:11:44,579 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.1 percent of original size [2021-03-10 22:11:44,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:11:44,581 INFO L247 ElimStorePlain]: Needed 41 recursive calls to eliminate 3 variables, input treesize:1369, output treesize:178 [2021-03-10 22:11:44,791 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:11:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:45,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100132018] [2021-03-10 22:11:45,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:45,116 INFO L87 Difference]: Start difference. First operand 1090 states and 3940 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,466 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:11:45,660 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:11:46,000 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-03-10 22:11:46,594 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-10 22:11:46,853 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 22:11:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:46,909 INFO L93 Difference]: Finished difference Result 1362 states and 4696 transitions. [2021-03-10 22:11:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:46,911 INFO L225 Difference]: With dead ends: 1362 [2021-03-10 22:11:46,911 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 22:11:46,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2202.0ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 22:11:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1088. [2021-03-10 22:11:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.6182152713891442) internal successors, (3933), 1087 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3933 transitions. [2021-03-10 22:11:46,924 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3933 transitions. Word has length 20 [2021-03-10 22:11:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:46,924 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 3933 transitions. [2021-03-10 22:11:46,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3933 transitions. [2021-03-10 22:11:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:46,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:46,925 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:47,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13812,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:47,139 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash -218489790, now seen corresponding path program 87 times [2021-03-10 22:11:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:47,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010923687] [2021-03-10 22:11:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010923687] [2021-03-10 22:11:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53553901] [2021-03-10 22:11:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:47,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:47,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:47,876 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 22:11:49,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:49,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:49,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:49,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:49,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:49,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:49,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,202 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:49,208 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,213 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,218 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,222 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,227 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:49,233 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,237 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:49,243 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:49,248 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,417 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:11:49,417 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.9 percent of original size [2021-03-10 22:11:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:49,422 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:49,427 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:49,431 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:49,436 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:49,440 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:49,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:11:49,510 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:781, output treesize:89 [2021-03-10 22:11:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:49,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:49,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965282574] [2021-03-10 22:11:49,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:49,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:49,675 INFO L87 Difference]: Start difference. First operand 1088 states and 3933 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,455 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 22:11:51,005 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-10 22:11:51,265 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-10 22:11:51,399 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:11:51,983 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-10 22:11:52,396 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-10 22:11:52,570 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:11:52,810 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 22:11:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:52,921 INFO L93 Difference]: Finished difference Result 1392 states and 4762 transitions. [2021-03-10 22:11:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:11:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:52,924 INFO L225 Difference]: With dead ends: 1392 [2021-03-10 22:11:52,924 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 22:11:52,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3491.4ms TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:11:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 22:11:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1094. [2021-03-10 22:11:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.617566331198536) internal successors, (3954), 1093 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3954 transitions. [2021-03-10 22:11:52,936 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3954 transitions. Word has length 20 [2021-03-10 22:11:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:52,936 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3954 transitions. [2021-03-10 22:11:52,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3954 transitions. [2021-03-10 22:11:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:52,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:52,938 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:53,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14101,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:53,139 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash -975516158, now seen corresponding path program 88 times [2021-03-10 22:11:53,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:53,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555484135] [2021-03-10 22:11:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555484135] [2021-03-10 22:11:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726831268] [2021-03-10 22:11:53,378 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:53,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:53,826 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:11:54,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:54,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:54,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:54,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:54,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:54,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:54,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:54,501 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:54,514 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,520 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:54,527 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,532 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:54,545 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,550 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,556 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:11:54,562 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,567 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:11:54,574 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:54,582 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,587 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,593 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,598 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:11:54,604 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,610 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,615 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,620 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:11:54,625 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,918 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 22:11:54,919 INFO L628 ElimStorePlain]: treesize reduction 31, result has 87.3 percent of original size [2021-03-10 22:11:54,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,924 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,929 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:54,935 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:11:54,940 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,945 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,950 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:54,955 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:55,080 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:11:55,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:55,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:11:55,082 INFO L247 ElimStorePlain]: Needed 38 recursive calls to eliminate 3 variables, input treesize:1268, output treesize:162 [2021-03-10 22:11:55,294 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:11:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:55,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:55,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:55,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848528357] [2021-03-10 22:11:55,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:55,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:55,474 INFO L87 Difference]: Start difference. First operand 1094 states and 3954 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,967 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 22:11:56,336 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 22:11:56,608 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:11:56,925 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 22:11:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:56,952 INFO L93 Difference]: Finished difference Result 1272 states and 4430 transitions. [2021-03-10 22:11:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:56,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:11:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:56,955 INFO L225 Difference]: With dead ends: 1272 [2021-03-10 22:11:56,955 INFO L226 Difference]: Without dead ends: 1242 [2021-03-10 22:11:56,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1970.5ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-03-10 22:11:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1094. [2021-03-10 22:11:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.617566331198536) internal successors, (3954), 1093 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3954 transitions. [2021-03-10 22:11:56,967 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3954 transitions. Word has length 20 [2021-03-10 22:11:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:56,967 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 3954 transitions. [2021-03-10 22:11:56,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3954 transitions. [2021-03-10 22:11:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:11:56,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:56,969 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:57,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14475,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:57,185 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash -396413250, now seen corresponding path program 89 times [2021-03-10 22:11:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:57,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594485861] [2021-03-10 22:11:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594485861] [2021-03-10 22:11:57,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552863306] [2021-03-10 22:11:57,513 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:57,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:11:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:57,952 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:11:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:58,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:11:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343810227] [2021-03-10 22:11:58,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:11:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:11:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:58,321 INFO L87 Difference]: Start difference. First operand 1094 states and 3954 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,155 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-03-10 22:11:59,361 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 22:11:59,815 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:12:00,090 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:12:00,329 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-03-10 22:12:00,637 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:12:00,777 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:12:00,960 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 22:12:01,133 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:12:01,426 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-10 22:12:01,685 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-10 22:12:01,923 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 22:12:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:01,973 INFO L93 Difference]: Finished difference Result 1762 states and 5770 transitions. [2021-03-10 22:12:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:12:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:01,976 INFO L225 Difference]: With dead ends: 1762 [2021-03-10 22:12:01,976 INFO L226 Difference]: Without dead ends: 1672 [2021-03-10 22:12:01,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3839.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:12:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-03-10 22:12:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1108. [2021-03-10 22:12:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.6205962059620598) internal successors, (4008), 1107 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 4008 transitions. [2021-03-10 22:12:01,991 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 4008 transitions. Word has length 20 [2021-03-10 22:12:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:01,991 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 4008 transitions. [2021-03-10 22:12:01,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 4008 transitions. [2021-03-10 22:12:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:01,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:01,992 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:02,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14644 [2021-03-10 22:12:02,193 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash 69319048, now seen corresponding path program 90 times [2021-03-10 22:12:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:02,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884518690] [2021-03-10 22:12:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884518690] [2021-03-10 22:12:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026064085] [2021-03-10 22:12:02,463 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:02,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:12:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:02,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:02,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:02,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:02,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:02,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:02,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:02,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:02,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:02,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:02,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:02,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:02,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:02,982 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:02,991 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:02,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:02,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:02,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:03,005 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:03,013 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:03,021 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:03,028 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:03,035 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:03,043 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:03,050 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:03,056 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:03,063 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:03,071 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:03,077 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,590 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:12:03,590 INFO L628 ElimStorePlain]: treesize reduction 78, result has 83.0 percent of original size [2021-03-10 22:12:03,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:12:03,595 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1171, output treesize:380 [2021-03-10 22:12:04,047 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2021-03-10 22:12:04,260 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:12:05,559 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_852, ends_with_6], 3=[v_prenex_861, v_prenex_850, v_prenex_860, v_prenex_863, v_prenex_862, v_prenex_854, v_prenex_864, v_prenex_856, v_prenex_855, v_prenex_857, v_prenex_849, v_prenex_859], 10=[v_prenex_851, ends_with_10]} [2021-03-10 22:12:05,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:05,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:05,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:05,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:05,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:05,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:05,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:05,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:05,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,040 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 82 [2021-03-10 22:12:06,040 INFO L628 ElimStorePlain]: treesize reduction 656, result has 25.8 percent of original size [2021-03-10 22:12:06,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:06,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,205 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:12:06,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:06,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,359 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:12:06,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,359 INFO L518 ElimStorePlain]: Eliminatee v_prenex_850 vanished before elimination [2021-03-10 22:12:06,360 INFO L518 ElimStorePlain]: Eliminatee v_prenex_860 vanished before elimination [2021-03-10 22:12:06,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:06,366 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,511 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:12:06,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:06,517 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,661 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:12:06,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:06,668 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,809 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:12:06,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:06,815 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,953 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 22:12:06,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:06,959 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,095 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:12:07,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:07,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,235 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:12:07,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:07,241 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,372 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 22:12:07,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_849 vanished before elimination [2021-03-10 22:12:07,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_859 vanished before elimination [2021-03-10 22:12:07,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:07,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,506 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:12:07,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:07,512 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:07,637 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 22:12:07,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:07,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 16 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:12:07,642 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 23 variables, input treesize:1149, output treesize:148 [2021-03-10 22:12:07,767 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:12:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:07,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:07,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:07,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887857414] [2021-03-10 22:12:07,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:07,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:07,963 INFO L87 Difference]: Start difference. First operand 1108 states and 4008 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,906 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-03-10 22:12:09,551 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:12:09,886 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 22:12:10,229 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-03-10 22:12:10,575 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:12:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:10,589 INFO L93 Difference]: Finished difference Result 1427 states and 4917 transitions. [2021-03-10 22:12:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:12:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:10,592 INFO L225 Difference]: With dead ends: 1427 [2021-03-10 22:12:10,592 INFO L226 Difference]: Without dead ends: 1382 [2021-03-10 22:12:10,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3309.2ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:12:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-03-10 22:12:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1116. [2021-03-10 22:12:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.6197309417040358) internal successors, (4036), 1115 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 4036 transitions. [2021-03-10 22:12:10,604 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 4036 transitions. Word has length 20 [2021-03-10 22:12:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:10,604 INFO L480 AbstractCegarLoop]: Abstraction has 1116 states and 4036 transitions. [2021-03-10 22:12:10,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 4036 transitions. [2021-03-10 22:12:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:10,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:10,606 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:10,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14666 [2021-03-10 22:12:10,806 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1254401028, now seen corresponding path program 91 times [2021-03-10 22:12:10,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:10,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180778468] [2021-03-10 22:12:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:11,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180778468] [2021-03-10 22:12:11,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604920617] [2021-03-10 22:12:11,092 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:12:11,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:11,323 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 22:12:11,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:11,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:11,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:11,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:11,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:11,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:11,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:11,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:11,700 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:11,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:11,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:11,725 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:11,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:11,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:11,749 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:11,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:11,764 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:11,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:11,780 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:11,788 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:11,794 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:12,226 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-10 22:12:12,226 INFO L628 ElimStorePlain]: treesize reduction 80, result has 79.2 percent of original size [2021-03-10 22:12:12,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:12:12,230 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:937, output treesize:305 [2021-03-10 22:12:12,463 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:12:15,278 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_870, v_prenex_880, v_prenex_896, ends_with_6, v_prenex_890], 21=[v_prenex_891, v_prenex_885, v_prenex_879], 66=[ends_with_10]} [2021-03-10 22:12:15,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:15,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:15,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:15,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:15,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:15,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:15,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:15,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:15,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,198 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 110 [2021-03-10 22:12:16,199 INFO L628 ElimStorePlain]: treesize reduction 1350, result has 24.3 percent of original size [2021-03-10 22:12:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:16,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:16,213 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,521 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 22:12:16,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:16,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,530 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,537 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,838 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:12:16,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,846 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,853 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,152 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:12:17,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:17,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:17,160 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:17,168 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,466 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:12:17,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:17,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:17,480 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,763 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:12:17,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:17,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:17,770 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:17,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:17,776 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,271 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-03-10 22:12:18,272 INFO L628 ElimStorePlain]: treesize reduction 38, result has 90.3 percent of original size [2021-03-10 22:12:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:18,278 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:18,285 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,526 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:12:18,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:18,533 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:18,540 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:18,546 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:18,775 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:12:18,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:18,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 21 dim-0 vars, 9 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:12:18,779 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 30 variables, input treesize:2105, output treesize:225 [2021-03-10 22:12:18,978 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 22:12:19,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:12:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:19,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:19,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610134162] [2021-03-10 22:12:19,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:19,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:19,332 INFO L87 Difference]: Start difference. First operand 1116 states and 4036 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:20,644 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 22:12:21,054 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-03-10 22:12:21,416 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-10 22:12:22,038 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-03-10 22:12:22,389 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-03-10 22:12:22,755 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-03-10 22:12:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:22,778 INFO L93 Difference]: Finished difference Result 1575 states and 5337 transitions. [2021-03-10 22:12:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:12:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:22,781 INFO L225 Difference]: With dead ends: 1575 [2021-03-10 22:12:22,781 INFO L226 Difference]: Without dead ends: 1500 [2021-03-10 22:12:22,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3848.8ms TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:12:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-03-10 22:12:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1113. [2021-03-10 22:12:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 3.6196043165467624) internal successors, (4025), 1112 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 4025 transitions. [2021-03-10 22:12:22,794 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 4025 transitions. Word has length 20 [2021-03-10 22:12:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:22,794 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 4025 transitions. [2021-03-10 22:12:22,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 4025 transitions. [2021-03-10 22:12:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:22,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:22,795 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:22,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14993,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:22,995 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1280513328, now seen corresponding path program 92 times [2021-03-10 22:12:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:22,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227831201] [2021-03-10 22:12:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:23,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227831201] [2021-03-10 22:12:23,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434594760] [2021-03-10 22:12:23,240 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:23,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:12:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:23,624 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 22:12:24,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:24,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:24,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:24,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:24,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:24,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:24,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:24,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,668 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,686 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,693 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:24,702 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,716 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,722 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:24,731 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,738 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,745 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,752 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,759 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,766 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,773 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,780 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,788 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,795 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,802 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,808 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,815 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:24,824 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:24,833 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,841 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,848 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,856 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,863 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,869 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:24,878 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,886 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:24,894 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,900 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:24,908 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:24,916 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,922 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:24,929 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,935 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,941 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,947 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:24,953 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:24,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:24,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:24,959 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,452 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-03-10 22:12:25,453 INFO L628 ElimStorePlain]: treesize reduction 81, result has 80.5 percent of original size [2021-03-10 22:12:25,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:25,459 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,465 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,471 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,478 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,483 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,490 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:25,496 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:25,502 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:25,508 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:25,514 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:25,717 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 22:12:25,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:25,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:12:25,720 INFO L247 ElimStorePlain]: Needed 61 recursive calls to eliminate 3 variables, input treesize:2326, output treesize:255 [2021-03-10 22:12:26,053 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:12:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:26,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:26,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:12:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490821685] [2021-03-10 22:12:26,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:26,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:26,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:26,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:26,363 INFO L87 Difference]: Start difference. First operand 1113 states and 4025 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,630 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:12:26,987 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:12:27,216 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 22:12:27,615 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 22:12:27,988 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 22:12:28,138 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:12:28,414 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 22:12:28,764 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 22:12:29,007 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:12:29,322 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-03-10 22:12:29,635 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-10 22:12:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:29,689 INFO L93 Difference]: Finished difference Result 1515 states and 5125 transitions. [2021-03-10 22:12:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:12:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:29,692 INFO L225 Difference]: With dead ends: 1515 [2021-03-10 22:12:29,692 INFO L226 Difference]: Without dead ends: 1425 [2021-03-10 22:12:29,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3659.4ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:12:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-03-10 22:12:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1112. [2021-03-10 22:12:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.6246624662466247) internal successors, (4027), 1111 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4027 transitions. [2021-03-10 22:12:29,705 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4027 transitions. Word has length 20 [2021-03-10 22:12:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:29,705 INFO L480 AbstractCegarLoop]: Abstraction has 1112 states and 4027 transitions. [2021-03-10 22:12:29,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4027 transitions. [2021-03-10 22:12:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:29,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:29,706 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:29,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15259 [2021-03-10 22:12:29,907 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -779303424, now seen corresponding path program 93 times [2021-03-10 22:12:29,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:29,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146884012] [2021-03-10 22:12:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146884012] [2021-03-10 22:12:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993863843] [2021-03-10 22:12:30,200 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:30,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:12:30,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:12:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:30,519 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:12:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:30,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:30,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,861 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 7 treesize of output 1 [2021-03-10 22:12:30,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:30,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:30,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:30,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,450 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-03-10 22:12:31,450 INFO L628 ElimStorePlain]: treesize reduction 477, result has 42.1 percent of original size [2021-03-10 22:12:31,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:31,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:31,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,718 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:12:31,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:31,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:31,726 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:31,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,980 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:12:31,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:31,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:31,994 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:32,239 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:12:32,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:32,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:12:32,244 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:969, output treesize:321 [2021-03-10 22:12:32,488 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:12:32,711 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 22:12:33,838 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_912], 6=[ends_with_6], 10=[v_prenex_911], 55=[ends_with_10]} [2021-03-10 22:12:33,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:33,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:33,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,869 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:33,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:33,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:33,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:33,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,318 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 78 [2021-03-10 22:12:34,318 INFO L628 ElimStorePlain]: treesize reduction 740, result has 24.3 percent of original size [2021-03-10 22:12:34,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:34,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:34,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:34,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:34,343 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,506 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:12:34,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:34,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:34,517 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,655 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:12:34,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:34,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:34,667 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:34,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:34,678 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,806 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:12:34,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:12:34,809 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 13 variables, input treesize:1189, output treesize:148 [2021-03-10 22:12:34,939 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 22:12:35,121 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 22:12:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:35,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:35,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640631149] [2021-03-10 22:12:35,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:35,215 INFO L87 Difference]: Start difference. First operand 1112 states and 4027 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:36,243 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-03-10 22:12:36,817 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 22:12:37,127 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:12:37,444 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-03-10 22:12:37,760 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-10 22:12:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:37,784 INFO L93 Difference]: Finished difference Result 1492 states and 5077 transitions. [2021-03-10 22:12:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:12:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:37,787 INFO L225 Difference]: With dead ends: 1492 [2021-03-10 22:12:37,787 INFO L226 Difference]: Without dead ends: 1432 [2021-03-10 22:12:37,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3170.5ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:12:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-03-10 22:12:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1120. [2021-03-10 22:12:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.623771224307417) internal successors, (4055), 1119 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4055 transitions. [2021-03-10 22:12:37,800 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4055 transitions. Word has length 20 [2021-03-10 22:12:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:37,800 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 4055 transitions. [2021-03-10 22:12:37,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4055 transitions. [2021-03-10 22:12:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:37,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:37,802 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:38,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15581,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:38,002 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 405778556, now seen corresponding path program 94 times [2021-03-10 22:12:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:38,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915405924] [2021-03-10 22:12:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:38,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915405924] [2021-03-10 22:12:38,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918572104] [2021-03-10 22:12:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:38,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:38,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:12:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:38,606 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 22:12:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:38,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:39,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:39,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:39,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,599 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 106 [2021-03-10 22:12:39,600 INFO L628 ElimStorePlain]: treesize reduction 223, result has 65.9 percent of original size [2021-03-10 22:12:39,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:39,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:39,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:39,623 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,880 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-03-10 22:12:39,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:39,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:39,896 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,146 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:12:40,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:40,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:40,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:40,162 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:40,169 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,414 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:12:40,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:40,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:12:40,428 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 13 variables, input treesize:753, output treesize:395 [2021-03-10 22:12:40,860 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 115 [2021-03-10 22:12:43,420 INFO L446 ElimStorePlain]: Different costs {15=[v_prenex_929], 21=[v_prenex_931], 28=[ends_with_10], 36=[ends_with_6]} [2021-03-10 22:12:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:43,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:43,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:43,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:43,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:43,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:43,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:43,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:43,522 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,415 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 132 [2021-03-10 22:12:44,416 INFO L628 ElimStorePlain]: treesize reduction 1228, result has 29.5 percent of original size [2021-03-10 22:12:44,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:44,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:44,433 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,749 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-10 22:12:44,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:44,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,758 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,767 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:44,775 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,783 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,792 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:44,800 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:44,808 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,817 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:44,825 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,104 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 22:12:45,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:45,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:45,113 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:45,122 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:45,130 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:45,139 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:45,148 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:45,156 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:45,165 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:45,173 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:45,182 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:45,191 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:45,448 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 22:12:45,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:45,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-03-10 22:12:45,453 INFO L247 ElimStorePlain]: Needed 30 recursive calls to eliminate 21 variables, input treesize:2060, output treesize:321 [2021-03-10 22:12:45,738 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-03-10 22:12:45,990 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-03-10 22:12:46,211 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:12:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:46,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:46,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:12:46,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581605019] [2021-03-10 22:12:46,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:46,326 INFO L87 Difference]: Start difference. First operand 1120 states and 4055 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,656 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-03-10 22:12:47,023 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:12:47,378 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-03-10 22:12:47,658 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-03-10 22:12:47,902 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-03-10 22:12:48,690 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-03-10 22:12:48,950 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:12:49,390 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-10 22:12:49,851 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2021-03-10 22:12:50,338 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-03-10 22:12:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:50,399 INFO L93 Difference]: Finished difference Result 1476 states and 5050 transitions. [2021-03-10 22:12:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:12:50,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:50,402 INFO L225 Difference]: With dead ends: 1476 [2021-03-10 22:12:50,402 INFO L226 Difference]: Without dead ends: 1461 [2021-03-10 22:12:50,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 5032.1ms TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:12:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-03-10 22:12:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1120. [2021-03-10 22:12:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.623771224307417) internal successors, (4055), 1119 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 4055 transitions. [2021-03-10 22:12:50,414 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 4055 transitions. Word has length 20 [2021-03-10 22:12:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:50,415 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 4055 transitions. [2021-03-10 22:12:50,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 4055 transitions. [2021-03-10 22:12:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:50,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:50,416 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:50,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15761,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:50,619 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash -534569836, now seen corresponding path program 95 times [2021-03-10 22:12:50,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:50,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073019487] [2021-03-10 22:12:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073019487] [2021-03-10 22:12:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742679804] [2021-03-10 22:12:51,130 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:51,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:51,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:12:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:12:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469857950] [2021-03-10 22:12:51,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:12:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:12:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:12:51,784 INFO L87 Difference]: Start difference. First operand 1120 states and 4055 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:52,336 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 22:12:52,657 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 22:12:52,961 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 22:12:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:53,105 INFO L93 Difference]: Finished difference Result 1279 states and 4456 transitions. [2021-03-10 22:12:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:12:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:53,115 INFO L225 Difference]: With dead ends: 1279 [2021-03-10 22:12:53,115 INFO L226 Difference]: Without dead ends: 1234 [2021-03-10 22:12:53,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-03-10 22:12:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1126. [2021-03-10 22:12:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 3.6293333333333333) internal successors, (4083), 1125 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 4083 transitions. [2021-03-10 22:12:53,127 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 4083 transitions. Word has length 20 [2021-03-10 22:12:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:53,127 INFO L480 AbstractCegarLoop]: Abstraction has 1126 states and 4083 transitions. [2021-03-10 22:12:53,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 4083 transitions. [2021-03-10 22:12:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:12:53,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:53,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:53,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16259,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:53,343 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 892897788, now seen corresponding path program 96 times [2021-03-10 22:12:53,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:53,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607380212] [2021-03-10 22:12:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:53,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607380212] [2021-03-10 22:12:53,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610004383] [2021-03-10 22:12:53,623 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:53,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:53,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:12:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:53,840 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:12:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:54,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:12:54,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:54,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:54,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:54,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:54,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:54,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:54,291 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:54,300 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:54,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:54,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,331 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:12:54,339 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,346 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,353 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:54,361 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:12:54,368 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:12:54,388 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,655 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 22:12:54,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:12:54,661 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:969, output treesize:400 [2021-03-10 22:12:55,132 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-03-10 22:12:56,535 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_961, v_prenex_950, ends_with_10, v_prenex_942, v_prenex_955, v_prenex_944, v_prenex_943, v_prenex_946, v_prenex_945, v_prenex_948, v_prenex_947], 21=[ends_with_2, v_prenex_963, v_prenex_957, v_prenex_949]} [2021-03-10 22:12:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:56,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:56,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:56,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:56,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:56,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:56,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:56,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:56,642 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:57,300 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 105 [2021-03-10 22:12:57,301 INFO L628 ElimStorePlain]: treesize reduction 1039, result has 25.5 percent of original size [2021-03-10 22:12:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:57,309 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:57,568 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:12:57,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:57,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:57,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:57,583 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:57,847 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:12:57,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:57,848 INFO L518 ElimStorePlain]: Eliminatee v_prenex_942 vanished before elimination [2021-03-10 22:12:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:57,855 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:57,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,105 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:12:58,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:58,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_944 vanished before elimination [2021-03-10 22:12:58,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_943 vanished before elimination [2021-03-10 22:12:58,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_946 vanished before elimination [2021-03-10 22:12:58,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:58,113 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,356 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:12:58,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:58,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_948 vanished before elimination [2021-03-10 22:12:58,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_947 vanished before elimination [2021-03-10 22:12:58,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:58,363 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:58,371 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,606 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:12:58,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:58,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:58,614 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:58,620 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,847 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:12:58,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:58,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:58,854 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:12:58,861 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:59,082 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:12:59,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:59,089 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:59,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:12:59,096 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:59,314 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:12:59,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:59,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 15 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:12:59,317 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 32 variables, input treesize:1729, output treesize:225 [2021-03-10 22:12:59,513 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 22:12:59,669 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:12:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:59,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:59,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:12:59,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442372264] [2021-03-10 22:12:59,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:59,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:59,871 INFO L87 Difference]: Start difference. First operand 1126 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:00,019 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:13:00,192 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:13:00,429 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:13:01,196 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-10 22:13:01,632 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-03-10 22:13:01,770 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:13:02,115 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-10 22:13:02,247 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:13:02,643 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:13:03,021 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-03-10 22:13:03,407 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-03-10 22:13:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:03,446 INFO L93 Difference]: Finished difference Result 1563 states and 5270 transitions. [2021-03-10 22:13:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:13:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:03,449 INFO L225 Difference]: With dead ends: 1563 [2021-03-10 22:13:03,449 INFO L226 Difference]: Without dead ends: 1458 [2021-03-10 22:13:03,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4273.8ms TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:13:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-03-10 22:13:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1136. [2021-03-10 22:13:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.6343612334801763) internal successors, (4125), 1135 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 4125 transitions. [2021-03-10 22:13:03,462 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 4125 transitions. Word has length 20 [2021-03-10 22:13:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:03,462 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 4125 transitions. [2021-03-10 22:13:03,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 4125 transitions. [2021-03-10 22:13:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:03,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:03,464 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:03,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16277 [2021-03-10 22:13:03,664 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:03,665 INFO L82 PathProgramCache]: Analyzing trace with hash 337780176, now seen corresponding path program 97 times [2021-03-10 22:13:03,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:03,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810526806] [2021-03-10 22:13:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810526806] [2021-03-10 22:13:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977694712] [2021-03-10 22:13:03,980 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:13:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:04,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:04,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:04,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:04,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:04,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:04,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:04,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:04,612 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:04,619 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:04,627 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:04,633 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:04,641 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:04,648 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,653 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:05,022 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 22:13:05,023 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-03-10 22:13:05,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:13:05,027 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:903, output treesize:301 [2021-03-10 22:13:05,354 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 22:13:05,563 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:13:05,787 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:13:06,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:06,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:06,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,007 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:13:07,008 INFO L628 ElimStorePlain]: treesize reduction 85, result has 61.0 percent of original size [2021-03-10 22:13:07,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:07,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:07,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:07,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:07,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:13:07,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:251, output treesize:125 [2021-03-10 22:13:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539574407] [2021-03-10 22:13:07,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:07,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:07,489 INFO L87 Difference]: Start difference. First operand 1136 states and 4125 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:07,787 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 22:13:08,125 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 22:13:08,483 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 22:13:08,842 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 22:13:09,219 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 22:13:09,429 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:13:09,833 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:13:10,031 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 22:13:10,395 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 22:13:10,804 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:13:11,222 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-03-10 22:13:11,643 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-10 22:13:12,171 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-03-10 22:13:12,427 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 22:13:12,923 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-03-10 22:13:13,719 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-03-10 22:13:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:13,726 INFO L93 Difference]: Finished difference Result 1713 states and 5871 transitions. [2021-03-10 22:13:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:13:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:13,730 INFO L225 Difference]: With dead ends: 1713 [2021-03-10 22:13:13,730 INFO L226 Difference]: Without dead ends: 1698 [2021-03-10 22:13:13,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 6782.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:13:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-03-10 22:13:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1145. [2021-03-10 22:13:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.637237762237762) internal successors, (4161), 1144 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 4161 transitions. [2021-03-10 22:13:13,744 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 4161 transitions. Word has length 20 [2021-03-10 22:13:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:13,744 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 4161 transitions. [2021-03-10 22:13:13,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 4161 transitions. [2021-03-10 22:13:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:13,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:13,745 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:13,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16483 [2021-03-10 22:13:13,946 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1832383140, now seen corresponding path program 98 times [2021-03-10 22:13:13,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:13,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663886545] [2021-03-10 22:13:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663886545] [2021-03-10 22:13:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916472799] [2021-03-10 22:13:14,233 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:14,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:13:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:14,450 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:13:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:14,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:14,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:14,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:14,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:14,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:14,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:14,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:14,803 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:14,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:14,821 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,829 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:14,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:14,847 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:14,857 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,865 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:14,873 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,883 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:14,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:14,890 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:15,117 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:13:15,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:15,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:13:15,122 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:785, output treesize:308 [2021-03-10 22:13:15,499 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-03-10 22:13:15,666 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:13:15,851 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:13:16,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:16,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:16,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,865 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:13:16,866 INFO L628 ElimStorePlain]: treesize reduction 69, result has 59.4 percent of original size [2021-03-10 22:13:16,866 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-03-10 22:13:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:16,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:13:16,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:17,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:13:17,005 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:210, output treesize:92 [2021-03-10 22:13:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:17,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:17,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:17,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420827310] [2021-03-10 22:13:17,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:17,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:17,183 INFO L87 Difference]: Start difference. First operand 1145 states and 4161 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:17,321 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 22:13:17,491 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-10 22:13:17,696 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-10 22:13:17,881 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 22:13:18,175 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-03-10 22:13:18,672 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 22:13:18,820 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:13:19,299 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-03-10 22:13:19,692 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:13:20,117 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2021-03-10 22:13:20,546 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 80 [2021-03-10 22:13:20,985 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2021-03-10 22:13:21,705 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-03-10 22:13:22,346 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2021-03-10 22:13:22,745 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2021-03-10 22:13:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:22,765 INFO L93 Difference]: Finished difference Result 1656 states and 5707 transitions. [2021-03-10 22:13:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:13:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:22,769 INFO L225 Difference]: With dead ends: 1656 [2021-03-10 22:13:22,769 INFO L226 Difference]: Without dead ends: 1641 [2021-03-10 22:13:22,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 6233.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:13:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-03-10 22:13:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1145. [2021-03-10 22:13:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.637237762237762) internal successors, (4161), 1144 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 4161 transitions. [2021-03-10 22:13:22,783 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 4161 transitions. Word has length 20 [2021-03-10 22:13:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:22,783 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 4161 transitions. [2021-03-10 22:13:22,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 4161 transitions. [2021-03-10 22:13:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:22,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:22,784 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:22,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16699,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:22,985 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1750984084, now seen corresponding path program 99 times [2021-03-10 22:13:22,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:22,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573827165] [2021-03-10 22:13:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573827165] [2021-03-10 22:13:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183489116] [2021-03-10 22:13:23,247 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:23,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:13:23,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:13:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:23,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:23,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:23,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:23,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:23,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:23,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:23,845 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:23,866 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,873 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:23,889 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:23,897 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:23,904 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:23,911 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:23,919 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:23,926 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:23,933 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:23,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:23,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:23,940 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,253 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 22:13:24,254 INFO L628 ElimStorePlain]: treesize reduction 55, result has 80.6 percent of original size [2021-03-10 22:13:24,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:13:24,258 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:737, output treesize:229 [2021-03-10 22:13:24,590 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-03-10 22:13:24,799 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:13:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:25,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:25,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:25,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:25,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:25,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:25,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:25,904 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 22:13:25,905 INFO L628 ElimStorePlain]: treesize reduction 57, result has 65.7 percent of original size [2021-03-10 22:13:25,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:25,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:25,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:25,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:13:25,987 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:206, output treesize:105 [2021-03-10 22:13:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:26,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:26,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:26,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123700296] [2021-03-10 22:13:26,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:26,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:26,182 INFO L87 Difference]: Start difference. First operand 1145 states and 4161 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:27,136 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-03-10 22:13:27,759 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-03-10 22:13:28,414 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-03-10 22:13:29,001 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-03-10 22:13:29,681 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2021-03-10 22:13:29,875 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:13:30,462 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-03-10 22:13:30,977 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2021-03-10 22:13:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:30,980 INFO L93 Difference]: Finished difference Result 1728 states and 5856 transitions. [2021-03-10 22:13:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:13:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:30,984 INFO L225 Difference]: With dead ends: 1728 [2021-03-10 22:13:30,984 INFO L226 Difference]: Without dead ends: 1698 [2021-03-10 22:13:30,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5509.7ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:13:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-03-10 22:13:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1149. [2021-03-10 22:13:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.637630662020906) internal successors, (4176), 1148 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 4176 transitions. [2021-03-10 22:13:30,999 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 4176 transitions. Word has length 20 [2021-03-10 22:13:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:30,999 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 4176 transitions. [2021-03-10 22:13:30,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 4176 transitions. [2021-03-10 22:13:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:31,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:31,000 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:31,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16967,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:31,201 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -300458904, now seen corresponding path program 100 times [2021-03-10 22:13:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:31,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768364257] [2021-03-10 22:13:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:31,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768364257] [2021-03-10 22:13:31,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781847925] [2021-03-10 22:13:31,558 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:31,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:31,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:13:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:31,776 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:13:32,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:32,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:32,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:32,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:32,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:32,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:32,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:32,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:32,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,092 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:32,100 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,107 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:32,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:32,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,129 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:32,137 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:32,142 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:32,150 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:32,156 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,526 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 22:13:32,526 INFO L628 ElimStorePlain]: treesize reduction 32, result has 88.6 percent of original size [2021-03-10 22:13:32,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:13:32,530 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:789, output treesize:249 [2021-03-10 22:13:32,736 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 22:13:33,004 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:13:33,222 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:13:34,472 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_991, v_prenex_986, ends_with_6, v_prenex_985, v_prenex_989], 10=[ends_with_10, v_prenex_988]} [2021-03-10 22:13:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:34,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:34,699 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-03-10 22:13:34,699 INFO L628 ElimStorePlain]: treesize reduction 396, result has 24.6 percent of original size [2021-03-10 22:13:34,699 INFO L518 ElimStorePlain]: Eliminatee v_prenex_986 vanished before elimination [2021-03-10 22:13:34,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:13:34,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:34,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:34,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:34,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:13:34,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:34,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:34,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:13:34,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:35,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:13:35,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:35,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:13:35,098 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:535, output treesize:96 [2021-03-10 22:13:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:35,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:35,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483726328] [2021-03-10 22:13:35,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:35,292 INFO L87 Difference]: Start difference. First operand 1149 states and 4176 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:35,898 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-10 22:13:36,095 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-03-10 22:13:36,261 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 22:13:36,578 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 22:13:37,128 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2021-03-10 22:13:37,718 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2021-03-10 22:13:38,221 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-03-10 22:13:38,682 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2021-03-10 22:13:38,901 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:13:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:38,918 INFO L93 Difference]: Finished difference Result 1631 states and 5614 transitions. [2021-03-10 22:13:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:13:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:38,921 INFO L225 Difference]: With dead ends: 1631 [2021-03-10 22:13:38,921 INFO L226 Difference]: Without dead ends: 1616 [2021-03-10 22:13:38,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4425.1ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:13:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-03-10 22:13:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1147. [2021-03-10 22:13:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.637870855148342) internal successors, (4169), 1146 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 4169 transitions. [2021-03-10 22:13:38,935 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 4169 transitions. Word has length 20 [2021-03-10 22:13:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:38,935 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 4169 transitions. [2021-03-10 22:13:38,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 4169 transitions. [2021-03-10 22:13:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:38,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:38,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:39,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17221 [2021-03-10 22:13:39,137 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1598031908, now seen corresponding path program 101 times [2021-03-10 22:13:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:39,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282716434] [2021-03-10 22:13:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:39,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282716434] [2021-03-10 22:13:39,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339916430] [2021-03-10 22:13:39,418 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:39,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:13:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:13:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475554452] [2021-03-10 22:13:40,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:13:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:13:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:13:40,200 INFO L87 Difference]: Start difference. First operand 1147 states and 4169 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:40,924 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 22:13:41,068 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 22:13:41,553 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:13:41,736 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:13:42,053 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 22:13:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:42,205 INFO L93 Difference]: Finished difference Result 1611 states and 5579 transitions. [2021-03-10 22:13:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:42,208 INFO L225 Difference]: With dead ends: 1611 [2021-03-10 22:13:42,208 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 22:13:42,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2194.7ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:13:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 22:13:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1146. [2021-03-10 22:13:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.6366812227074234) internal successors, (4164), 1145 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 4164 transitions. [2021-03-10 22:13:42,222 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 4164 transitions. Word has length 20 [2021-03-10 22:13:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:42,222 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 4164 transitions. [2021-03-10 22:13:42,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 4164 transitions. [2021-03-10 22:13:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:42,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:42,223 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:42,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17407,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:42,425 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1863438574, now seen corresponding path program 102 times [2021-03-10 22:13:42,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:42,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501156972] [2021-03-10 22:13:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:42,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501156972] [2021-03-10 22:13:42,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756488360] [2021-03-10 22:13:42,770 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:42,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:42,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:13:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:42,990 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 22:13:43,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:43,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:43,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:43,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:43,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:43,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:43,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:43,415 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:43,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:43,431 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,438 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:43,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:43,455 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:43,463 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:43,471 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:43,479 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:43,484 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:43,489 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,497 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,505 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:43,513 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,521 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,529 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,536 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:43,544 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:43,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:43,550 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,911 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 22:13:43,912 INFO L628 ElimStorePlain]: treesize reduction 57, result has 81.6 percent of original size [2021-03-10 22:13:43,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:13:43,916 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 2 variables, input treesize:1006, output treesize:253 [2021-03-10 22:13:44,300 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-03-10 22:13:44,534 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 22:13:45,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:45,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:45,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:45,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:45,911 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:13:45,912 INFO L628 ElimStorePlain]: treesize reduction 82, result has 66.3 percent of original size [2021-03-10 22:13:45,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:45,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:46,043 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:13:46,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:46,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:13:46,046 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:287, output treesize:157 [2021-03-10 22:13:46,202 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:13:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:46,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:46,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:46,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230684512] [2021-03-10 22:13:46,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:46,428 INFO L87 Difference]: Start difference. First operand 1146 states and 4164 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:46,604 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 22:13:46,813 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 22:13:47,028 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 22:13:47,469 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 22:13:47,676 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 22:13:48,417 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2021-03-10 22:13:48,697 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:13:49,006 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:13:49,328 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 22:13:49,615 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 22:13:49,743 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:13:50,093 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 22:13:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:50,192 INFO L93 Difference]: Finished difference Result 1633 states and 5536 transitions. [2021-03-10 22:13:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:13:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:50,195 INFO L225 Difference]: With dead ends: 1633 [2021-03-10 22:13:50,195 INFO L226 Difference]: Without dead ends: 1573 [2021-03-10 22:13:50,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 4428.5ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:13:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-03-10 22:13:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1156. [2021-03-10 22:13:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.637229437229437) internal successors, (4201), 1155 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 4201 transitions. [2021-03-10 22:13:50,210 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 4201 transitions. Word has length 20 [2021-03-10 22:13:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:50,210 INFO L480 AbstractCegarLoop]: Abstraction has 1156 states and 4201 transitions. [2021-03-10 22:13:50,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 4201 transitions. [2021-03-10 22:13:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:50,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:50,211 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:50,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17428,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:50,412 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:50,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1246446742, now seen corresponding path program 103 times [2021-03-10 22:13:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:50,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134180398] [2021-03-10 22:13:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134180398] [2021-03-10 22:13:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886907648] [2021-03-10 22:13:50,753 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:50,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:13:50,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:51,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:51,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:51,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:51,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:51,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:51,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:51,375 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:13:51,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:51,389 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:51,398 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:51,420 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:51,431 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,441 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:51,453 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,463 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:51,474 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,484 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:13:51,495 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:51,505 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:51,513 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:51,522 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:51,944 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:13:51,945 INFO L628 ElimStorePlain]: treesize reduction 64, result has 80.8 percent of original size [2021-03-10 22:13:51,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 8 xjuncts. [2021-03-10 22:13:51,949 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 2 variables, input treesize:1005, output treesize:269 [2021-03-10 22:13:52,370 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-03-10 22:13:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:13:53,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:53,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:13:53,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:54,046 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2021-03-10 22:13:54,047 INFO L628 ElimStorePlain]: treesize reduction 203, result has 59.6 percent of original size [2021-03-10 22:13:54,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:54,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:54,275 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 22:13:54,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:54,275 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1003 vanished before elimination [2021-03-10 22:13:54,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:13:54,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:54,499 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:13:54,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:54,500 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1005 vanished before elimination [2021-03-10 22:13:54,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:54,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:54,718 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:13:54,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:54,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:54,930 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 22:13:54,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:54,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_999 vanished before elimination [2021-03-10 22:13:54,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:54,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:55,137 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 22:13:55,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:55,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 9 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:13:55,141 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 15 variables, input treesize:552, output treesize:239 [2021-03-10 22:13:55,475 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:13:55,649 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:13:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:55,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:55,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489176827] [2021-03-10 22:13:55,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:55,867 INFO L87 Difference]: Start difference. First operand 1156 states and 4201 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:57,195 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-03-10 22:13:57,338 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 22:13:57,845 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-03-10 22:13:58,349 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 22:13:58,705 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 22:13:59,015 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:13:59,451 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 22:13:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:59,517 INFO L93 Difference]: Finished difference Result 1737 states and 5916 transitions. [2021-03-10 22:13:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:13:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:13:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:59,520 INFO L225 Difference]: With dead ends: 1737 [2021-03-10 22:13:59,520 INFO L226 Difference]: Without dead ends: 1692 [2021-03-10 22:13:59,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 4281.1ms TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:13:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-03-10 22:13:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1154. [2021-03-10 22:13:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.638334778837814) internal successors, (4195), 1153 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 4195 transitions. [2021-03-10 22:13:59,534 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 4195 transitions. Word has length 20 [2021-03-10 22:13:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:59,534 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 4195 transitions. [2021-03-10 22:13:59,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 4195 transitions. [2021-03-10 22:13:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:13:59,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:59,536 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:59,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17768,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:59,736 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 513606198, now seen corresponding path program 104 times [2021-03-10 22:13:59,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:59,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632206284] [2021-03-10 22:13:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632206284] [2021-03-10 22:14:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266992689] [2021-03-10 22:14:00,088 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:00,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:00,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:00,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:00,304 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 22:14:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:01,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:01,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:01,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:01,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:01,853 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:01,869 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:01,894 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:01,904 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,911 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,918 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:01,927 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:01,936 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,943 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,950 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:01,959 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:01,968 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,976 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:01,985 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,992 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:02,002 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:02,009 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:02,018 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:02,027 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:02,034 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:02,044 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:02,053 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:02,061 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:02,068 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:02,077 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:02,083 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:02,092 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:02,101 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:02,109 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:02,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:02,117 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,607 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 22:14:02,607 INFO L628 ElimStorePlain]: treesize reduction 97, result has 75.7 percent of original size [2021-03-10 22:14:02,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:02,614 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:02,621 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:02,627 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:02,634 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:02,641 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:02,647 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:02,853 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 22:14:02,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:02,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-03-10 22:14:02,856 INFO L247 ElimStorePlain]: Needed 47 recursive calls to eliminate 3 variables, input treesize:1725, output treesize:240 [2021-03-10 22:14:03,194 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:14:03,360 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:14:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:03,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:03,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86110264] [2021-03-10 22:14:03,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:03,575 INFO L87 Difference]: Start difference. First operand 1154 states and 4195 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:03,810 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 22:14:03,985 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:14:04,176 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 22:14:04,515 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 22:14:05,429 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-03-10 22:14:05,838 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-03-10 22:14:06,201 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-03-10 22:14:06,468 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:14:06,811 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 22:14:07,164 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 22:14:07,368 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:14:07,673 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:14:08,101 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 22:14:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:08,196 INFO L93 Difference]: Finished difference Result 1767 states and 5995 transitions. [2021-03-10 22:14:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:14:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:08,199 INFO L225 Difference]: With dead ends: 1767 [2021-03-10 22:14:08,199 INFO L226 Difference]: Without dead ends: 1707 [2021-03-10 22:14:08,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 4878.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:14:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-03-10 22:14:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1157. [2021-03-10 22:14:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.63840830449827) internal successors, (4206), 1156 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 4206 transitions. [2021-03-10 22:14:08,213 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 4206 transitions. Word has length 20 [2021-03-10 22:14:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:08,213 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 4206 transitions. [2021-03-10 22:14:08,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 4206 transitions. [2021-03-10 22:14:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:08,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:08,214 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:08,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18010,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:08,414 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:08,415 INFO L82 PathProgramCache]: Analyzing trace with hash -998413246, now seen corresponding path program 105 times [2021-03-10 22:14:08,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:08,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354237446] [2021-03-10 22:14:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354237446] [2021-03-10 22:14:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448708858] [2021-03-10 22:14:08,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:08,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:14:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:08,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:09,870 INFO L446 ElimStorePlain]: Different costs {3=[ends_with_10], 6=[ends_with_2]} [2021-03-10 22:14:09,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:09,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:09,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:09,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,908 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:09,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:09,923 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:09,931 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:09,943 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,949 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,954 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:09,959 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:09,965 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,204 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:14:10,204 INFO L628 ElimStorePlain]: treesize reduction 106, result has 60.2 percent of original size [2021-03-10 22:14:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:10,209 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:10,214 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:10,219 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:10,224 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:10,230 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:10,234 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:10,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:10,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:14:10,322 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 3 variables, input treesize:714, output treesize:103 [2021-03-10 22:14:10,458 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:14:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:10,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:10,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:10,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204499650] [2021-03-10 22:14:10,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:10,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:10,562 INFO L87 Difference]: Start difference. First operand 1157 states and 4206 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:10,705 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:14:10,882 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:14:11,026 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:14:11,222 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:14:11,766 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-10 22:14:12,035 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 22:14:12,263 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 22:14:12,550 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 22:14:12,902 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 22:14:13,203 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 22:14:13,596 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 22:14:13,967 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-10 22:14:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:14,084 INFO L93 Difference]: Finished difference Result 1422 states and 4945 transitions. [2021-03-10 22:14:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:14:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:14,086 INFO L225 Difference]: With dead ends: 1422 [2021-03-10 22:14:14,087 INFO L226 Difference]: Without dead ends: 1392 [2021-03-10 22:14:14,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3899.2ms TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:14:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-03-10 22:14:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1161. [2021-03-10 22:14:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 3.639655172413793) internal successors, (4222), 1160 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 4222 transitions. [2021-03-10 22:14:14,099 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 4222 transitions. Word has length 20 [2021-03-10 22:14:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:14,099 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 4222 transitions. [2021-03-10 22:14:14,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 4222 transitions. [2021-03-10 22:14:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:14,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:14,101 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:14,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18385 [2021-03-10 22:14:14,301 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1055764750, now seen corresponding path program 106 times [2021-03-10 22:14:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:14,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339347580] [2021-03-10 22:14:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:14,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339347580] [2021-03-10 22:14:14,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585763276] [2021-03-10 22:14:14,634 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:14,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:16,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:16,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:16,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:16,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,133 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:16,140 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:16,153 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,158 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:16,165 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:16,173 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:16,181 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:16,188 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,194 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,199 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:16,204 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:16,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:16,210 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,397 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:14:16,397 INFO L628 ElimStorePlain]: treesize reduction 19, result has 87.4 percent of original size [2021-03-10 22:14:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:16,403 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:16,408 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:16,413 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:16,418 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:16,424 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:16,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:16,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:14:16,495 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 3 variables, input treesize:756, output treesize:83 [2021-03-10 22:14:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:16,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:16,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:16,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825613274] [2021-03-10 22:14:16,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:16,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:16,691 INFO L87 Difference]: Start difference. First operand 1161 states and 4222 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:17,703 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-10 22:14:17,960 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:14:18,181 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 22:14:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:18,297 INFO L93 Difference]: Finished difference Result 1321 states and 4678 transitions. [2021-03-10 22:14:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:14:18,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:18,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:18,300 INFO L225 Difference]: With dead ends: 1321 [2021-03-10 22:14:18,300 INFO L226 Difference]: Without dead ends: 1306 [2021-03-10 22:14:18,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1814.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:14:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-03-10 22:14:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1155. [2021-03-10 22:14:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.6421143847487003) internal successors, (4203), 1154 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 4203 transitions. [2021-03-10 22:14:18,312 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 4203 transitions. Word has length 20 [2021-03-10 22:14:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:18,313 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 4203 transitions. [2021-03-10 22:14:18,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 4203 transitions. [2021-03-10 22:14:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:18,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:18,314 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:18,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18520,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:18,514 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:18,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1535435202, now seen corresponding path program 107 times [2021-03-10 22:14:18,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:18,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598677968] [2021-03-10 22:14:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:18,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598677968] [2021-03-10 22:14:18,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196797582] [2021-03-10 22:14:18,887 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:18,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:19,336 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:14:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:19,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:19,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:14:19,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930573497] [2021-03-10 22:14:19,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:14:19,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:14:19,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:14:19,708 INFO L87 Difference]: Start difference. First operand 1155 states and 4203 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:20,281 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 22:14:20,561 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:14:20,744 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:14:20,979 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 22:14:21,195 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-10 22:14:21,389 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:14:21,568 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:14:21,942 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 22:14:22,102 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 22:14:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:22,103 INFO L93 Difference]: Finished difference Result 1547 states and 5272 transitions. [2021-03-10 22:14:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:14:22,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:22,105 INFO L225 Difference]: With dead ends: 1547 [2021-03-10 22:14:22,105 INFO L226 Difference]: Without dead ends: 1517 [2021-03-10 22:14:22,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2812.0ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:14:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-03-10 22:14:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1155. [2021-03-10 22:14:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.6421143847487003) internal successors, (4203), 1154 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 4203 transitions. [2021-03-10 22:14:22,119 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 4203 transitions. Word has length 20 [2021-03-10 22:14:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:22,119 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 4203 transitions. [2021-03-10 22:14:22,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 4203 transitions. [2021-03-10 22:14:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:22,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:22,121 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:22,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18799 [2021-03-10 22:14:22,321 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash 641480194, now seen corresponding path program 108 times [2021-03-10 22:14:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:22,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696233529] [2021-03-10 22:14:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696233529] [2021-03-10 22:14:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062944448] [2021-03-10 22:14:22,590 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:22,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:14:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:24,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:24,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:24,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:24,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:24,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:24,075 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,086 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:24,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:24,102 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,107 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,112 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,118 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:24,126 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:24,134 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,140 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:24,148 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:24,155 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,160 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:24,168 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:24,175 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:24,180 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:24,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:24,186 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,393 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:14:24,394 INFO L628 ElimStorePlain]: treesize reduction 46, result has 76.2 percent of original size [2021-03-10 22:14:24,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:24,400 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:24,405 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:24,410 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:24,416 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:24,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:24,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:14:24,502 INFO L247 ElimStorePlain]: Needed 30 recursive calls to eliminate 3 variables, input treesize:904, output treesize:103 [2021-03-10 22:14:24,646 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:14:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:24,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:24,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:24,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854549505] [2021-03-10 22:14:24,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:24,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:24,756 INFO L87 Difference]: Start difference. First operand 1155 states and 4203 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:25,273 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 22:14:25,542 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 22:14:25,783 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:14:26,004 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 22:14:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:26,112 INFO L93 Difference]: Finished difference Result 1315 states and 4652 transitions. [2021-03-10 22:14:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:26,115 INFO L225 Difference]: With dead ends: 1315 [2021-03-10 22:14:26,115 INFO L226 Difference]: Without dead ends: 1300 [2021-03-10 22:14:26,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1721.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:14:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-03-10 22:14:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1149. [2021-03-10 22:14:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.6445993031358883) internal successors, (4184), 1148 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 4184 transitions. [2021-03-10 22:14:26,126 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 4184 transitions. Word has length 20 [2021-03-10 22:14:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:26,127 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 4184 transitions. [2021-03-10 22:14:26,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 4184 transitions. [2021-03-10 22:14:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:26,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:26,128 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:26,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18820 [2021-03-10 22:14:26,328 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash -199712680, now seen corresponding path program 109 times [2021-03-10 22:14:26,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:26,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680825318] [2021-03-10 22:14:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680825318] [2021-03-10 22:14:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156945378] [2021-03-10 22:14:26,685 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:26,953 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 22:14:27,385 INFO L446 ElimStorePlain]: Different costs {6=[v_prenex_1013, ends_with_2], 10=[v_prenex_1016]} [2021-03-10 22:14:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:27,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:27,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:27,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:27,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:27,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:27,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:27,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:27,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:14:27,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,222 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2021-03-10 22:14:28,223 INFO L628 ElimStorePlain]: treesize reduction 259, result has 67.9 percent of original size [2021-03-10 22:14:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:28,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:28,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,607 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:14:28,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:28,616 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,631 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:28,639 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,647 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,655 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,663 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,671 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:28,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:28,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:29,008 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:14:29,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:29,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 10 dim-0 vars, and 13 xjuncts. [2021-03-10 22:14:29,024 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 10 variables, input treesize:920, output treesize:492 [2021-03-10 22:14:29,432 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 121 [2021-03-10 22:14:30,163 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 111 [2021-03-10 22:14:30,488 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:14:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:33,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:33,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:33,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:33,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:33,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:33,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:33,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:34,026 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 124 [2021-03-10 22:14:34,026 INFO L628 ElimStorePlain]: treesize reduction 1122, result has 22.5 percent of original size [2021-03-10 22:14:34,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:34,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:34,257 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 22:14:34,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:34,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1034 vanished before elimination [2021-03-10 22:14:34,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:34,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:34,486 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 22:14:34,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:34,486 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1035 vanished before elimination [2021-03-10 22:14:34,487 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1036 vanished before elimination [2021-03-10 22:14:34,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:34,495 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:34,716 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-10 22:14:34,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:34,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:34,937 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:14:34,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:34,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1050 vanished before elimination [2021-03-10 22:14:34,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1052 vanished before elimination [2021-03-10 22:14:34,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:34,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:35,157 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:14:35,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:35,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:35,387 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:14:35,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:35,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:35,602 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 22:14:35,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:35,603 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1033 vanished before elimination [2021-03-10 22:14:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:35,611 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:35,813 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:14:35,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:35,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1045 vanished before elimination [2021-03-10 22:14:35,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1046 vanished before elimination [2021-03-10 22:14:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:35,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,024 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:14:36,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:36,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,233 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 22:14:36,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1049 vanished before elimination [2021-03-10 22:14:36,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:36,257 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,462 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:14:36,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:36,472 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,666 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:14:36,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:36,674 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,865 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:14:36,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,865 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1062 vanished before elimination [2021-03-10 22:14:36,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:36,873 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:37,060 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:14:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:37,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1043 vanished before elimination [2021-03-10 22:14:37,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1065 vanished before elimination [2021-03-10 22:14:37,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1044 vanished before elimination [2021-03-10 22:14:37,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 28 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-10 22:14:37,065 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 44 variables, input treesize:1608, output treesize:208 [2021-03-10 22:14:37,332 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:14:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:37,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:37,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768549802] [2021-03-10 22:14:37,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:37,613 INFO L87 Difference]: Start difference. First operand 1149 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:37,929 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-03-10 22:14:38,275 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-03-10 22:14:38,784 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-10 22:14:39,358 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-10 22:14:39,518 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:14:39,850 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:14:40,102 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-03-10 22:14:40,737 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 127 [2021-03-10 22:14:41,586 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 137 [2021-03-10 22:14:42,225 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-03-10 22:14:43,137 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 146 [2021-03-10 22:14:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:43,145 INFO L93 Difference]: Finished difference Result 1589 states and 5502 transitions. [2021-03-10 22:14:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:14:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:43,148 INFO L225 Difference]: With dead ends: 1589 [2021-03-10 22:14:43,148 INFO L226 Difference]: Without dead ends: 1574 [2021-03-10 22:14:43,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 6945.1ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:14:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-03-10 22:14:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1164. [2021-03-10 22:14:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.64402407566638) internal successors, (4238), 1163 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 4238 transitions. [2021-03-10 22:14:43,162 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 4238 transitions. Word has length 20 [2021-03-10 22:14:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:43,162 INFO L480 AbstractCegarLoop]: Abstraction has 1164 states and 4238 transitions. [2021-03-10 22:14:43,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 4238 transitions. [2021-03-10 22:14:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:43,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:43,164 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:43,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19111 [2021-03-10 22:14:43,364 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1294890284, now seen corresponding path program 110 times [2021-03-10 22:14:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:43,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856053842] [2021-03-10 22:14:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:43,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856053842] [2021-03-10 22:14:43,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337093664] [2021-03-10 22:14:43,676 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:43,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:43,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:44,445 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_1070], 15=[v_prenex_1073], 28=[ends_with_2]} [2021-03-10 22:14:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:44,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:44,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:44,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:14:44,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,344 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 109 [2021-03-10 22:14:45,345 INFO L628 ElimStorePlain]: treesize reduction 588, result has 45.3 percent of original size [2021-03-10 22:14:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:45,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:45,362 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:45,370 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:45,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:45,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:45,396 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,729 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:14:45,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:45,738 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:45,746 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:45,754 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:46,081 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 22:14:46,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:46,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 11 xjuncts. [2021-03-10 22:14:46,103 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 12 variables, input treesize:1183, output treesize:440 [2021-03-10 22:14:46,564 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 125 [2021-03-10 22:14:47,081 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 87 [2021-03-10 22:14:47,339 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:14:47,554 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 22:14:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:48,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:48,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:48,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:48,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:48,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:48,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:48,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:48,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:48,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:48,989 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-03-10 22:14:48,990 INFO L628 ElimStorePlain]: treesize reduction 555, result has 20.5 percent of original size [2021-03-10 22:14:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:48,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,117 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:14:49,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:49,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:49,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:49,324 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:49,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:49,514 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:49,605 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:49,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:49,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:14:49,691 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:852, output treesize:99 [2021-03-10 22:14:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:14:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723577389] [2021-03-10 22:14:49,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:14:49,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:14:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:49,932 INFO L87 Difference]: Start difference. First operand 1164 states and 4238 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:50,876 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-10 22:14:51,669 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 109 [2021-03-10 22:14:52,240 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2021-03-10 22:14:53,164 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 115 [2021-03-10 22:14:53,919 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 115 [2021-03-10 22:14:54,708 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 138 [2021-03-10 22:14:55,528 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 94 [2021-03-10 22:14:55,681 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 22:14:56,479 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 112 [2021-03-10 22:14:56,703 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 22:14:56,960 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 22:14:57,844 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 124 [2021-03-10 22:14:58,720 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 123 [2021-03-10 22:14:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:58,910 INFO L93 Difference]: Finished difference Result 1867 states and 6262 transitions. [2021-03-10 22:14:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:14:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:58,913 INFO L225 Difference]: With dead ends: 1867 [2021-03-10 22:14:58,913 INFO L226 Difference]: Without dead ends: 1807 [2021-03-10 22:14:58,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 9476.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:14:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-10 22:14:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1171. [2021-03-10 22:14:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.647008547008547) internal successors, (4267), 1170 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 4267 transitions. [2021-03-10 22:14:58,928 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 4267 transitions. Word has length 20 [2021-03-10 22:14:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:58,928 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 4267 transitions. [2021-03-10 22:14:58,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 4267 transitions. [2021-03-10 22:14:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:58,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:58,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:59,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19390,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:59,144 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1213491228, now seen corresponding path program 111 times [2021-03-10 22:14:59,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:59,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983624321] [2021-03-10 22:14:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:59,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983624321] [2021-03-10 22:14:59,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595809318] [2021-03-10 22:14:59,508 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:59,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:14:59,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:14:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:59,841 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 22:15:00,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:00,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:00,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:00,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:00,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:00,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:00,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,368 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2021-03-10 22:15:01,369 INFO L628 ElimStorePlain]: treesize reduction 316, result has 52.3 percent of original size [2021-03-10 22:15:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:01,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:01,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,680 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:15:01,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:01,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:01,698 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,972 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 22:15:01,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:01,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:01,980 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:01,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:01,988 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:02,282 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 22:15:02,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:02,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 8 xjuncts. [2021-03-10 22:15:02,298 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:789, output treesize:321 [2021-03-10 22:15:02,620 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 22:15:03,097 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 87 [2021-03-10 22:15:03,492 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 22:15:05,239 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1119, v_prenex_1108, v_prenex_1111, v_prenex_1101, v_prenex_1102, v_prenex_1114, v_prenex_1103, v_prenex_1115, v_prenex_1104, v_prenex_1105, v_prenex_1106, v_prenex_1117, v_prenex_1107, v_prenex_1118, v_prenex_1120, v_prenex_1110], 10=[ends_with_10, ends_with_6]} [2021-03-10 22:15:05,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:05,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:05,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:05,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:05,607 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2021-03-10 22:15:05,608 INFO L628 ElimStorePlain]: treesize reduction 585, result has 20.3 percent of original size [2021-03-10 22:15:05,608 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1108 vanished before elimination [2021-03-10 22:15:05,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:05,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:05,743 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 22:15:05,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:05,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1101 vanished before elimination [2021-03-10 22:15:05,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1102 vanished before elimination [2021-03-10 22:15:05,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:05,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:05,876 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:15:05,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:05,877 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1103 vanished before elimination [2021-03-10 22:15:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:05,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:05,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:05,979 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1104 vanished before elimination [2021-03-10 22:15:05,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1105 vanished before elimination [2021-03-10 22:15:05,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1106 vanished before elimination [2021-03-10 22:15:05,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1117 vanished before elimination [2021-03-10 22:15:05,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1107 vanished before elimination [2021-03-10 22:15:05,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1118 vanished before elimination [2021-03-10 22:15:05,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:05,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:06,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:06,092 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:06,216 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:15:06,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:06,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:06,224 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:06,328 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 22:15:06,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:06,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:06,334 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:06,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:06,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 18 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:15:06,423 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 26 variables, input treesize:750, output treesize:101 [2021-03-10 22:15:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:06,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:06,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:15:06,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168300263] [2021-03-10 22:15:06,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:06,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:06,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:06,680 INFO L87 Difference]: Start difference. First operand 1171 states and 4267 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:07,683 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 106 [2021-03-10 22:15:08,217 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2021-03-10 22:15:08,997 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 77 [2021-03-10 22:15:09,678 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 108 [2021-03-10 22:15:09,860 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 22:15:10,514 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 140 [2021-03-10 22:15:11,473 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 82 [2021-03-10 22:15:12,230 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 116 [2021-03-10 22:15:12,431 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 22:15:13,181 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2021-03-10 22:15:14,334 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 164 DAG size of output: 93 [2021-03-10 22:15:15,071 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2021-03-10 22:15:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:15,303 INFO L93 Difference]: Finished difference Result 1838 states and 6216 transitions. [2021-03-10 22:15:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:15:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:15,306 INFO L225 Difference]: With dead ends: 1838 [2021-03-10 22:15:15,306 INFO L226 Difference]: Without dead ends: 1793 [2021-03-10 22:15:15,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 9157.8ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:15:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-03-10 22:15:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1167. [2021-03-10 22:15:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.6475128644939967) internal successors, (4253), 1166 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 4253 transitions. [2021-03-10 22:15:15,321 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 4253 transitions. Word has length 20 [2021-03-10 22:15:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:15,321 INFO L480 AbstractCegarLoop]: Abstraction has 1167 states and 4253 transitions. [2021-03-10 22:15:15,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 4253 transitions. [2021-03-10 22:15:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:15,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:15,323 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:15,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19717 [2021-03-10 22:15:15,538 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1943695790, now seen corresponding path program 112 times [2021-03-10 22:15:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:15,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483565580] [2021-03-10 22:15:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483565580] [2021-03-10 22:15:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051398235] [2021-03-10 22:15:15,925 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:15,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:15:15,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:15:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:16,408 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-03-10 22:15:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:17,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:15:17,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:17,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:17,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:17,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:17,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,743 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-03-10 22:15:17,744 INFO L628 ElimStorePlain]: treesize reduction 274, result has 52.7 percent of original size [2021-03-10 22:15:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:17,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:17,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:17,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:17,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:18,006 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:15:18,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:18,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:18,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:18,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:18,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:18,249 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:15:18,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:18,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 7 xjuncts. [2021-03-10 22:15:18,259 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:749, output treesize:283 [2021-03-10 22:15:18,650 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-03-10 22:15:21,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:21,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:21,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:21,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:21,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:21,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:21,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:21,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:21,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:21,646 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 96 [2021-03-10 22:15:21,647 INFO L628 ElimStorePlain]: treesize reduction 1038, result has 18.2 percent of original size [2021-03-10 22:15:21,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:21,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:21,832 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-10 22:15:21,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1144 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1133 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1134 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1135 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1146 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1136 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1137 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1148 vanished before elimination [2021-03-10 22:15:21,833 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1149 vanished before elimination [2021-03-10 22:15:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:21,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,018 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:15:22,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,019 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1128 vanished before elimination [2021-03-10 22:15:22,019 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1129 vanished before elimination [2021-03-10 22:15:22,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:22,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,195 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:15:22,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:22,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,378 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:15:22,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:22,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,563 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:15:22,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:22,571 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,734 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:15:22,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:22,742 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,905 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 22:15:22,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:22,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,067 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:15:23,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:23,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:23,075 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,237 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:15:23,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:23,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:23,245 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,394 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:15:23,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:23,401 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,548 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 22:15:23,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:23,549 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1132 vanished before elimination [2021-03-10 22:15:23,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 24 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:15:23,552 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 34 variables, input treesize:1413, output treesize:156 [2021-03-10 22:15:23,819 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:15:23,970 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:15:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:24,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:24,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:15:24,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330029373] [2021-03-10 22:15:24,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:24,116 INFO L87 Difference]: Start difference. First operand 1167 states and 4253 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:25,121 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-03-10 22:15:25,451 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-03-10 22:15:25,959 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-03-10 22:15:26,419 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-10 22:15:26,951 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-10 22:15:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:26,987 INFO L93 Difference]: Finished difference Result 1437 states and 5009 transitions. [2021-03-10 22:15:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:15:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:26,991 INFO L225 Difference]: With dead ends: 1437 [2021-03-10 22:15:26,991 INFO L226 Difference]: Without dead ends: 1407 [2021-03-10 22:15:26,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3747.5ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:15:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-03-10 22:15:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1169. [2021-03-10 22:15:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.6455479452054793) internal successors, (4258), 1168 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 4258 transitions. [2021-03-10 22:15:27,003 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 4258 transitions. Word has length 20 [2021-03-10 22:15:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:27,003 INFO L480 AbstractCegarLoop]: Abstraction has 1169 states and 4258 transitions. [2021-03-10 22:15:27,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 4258 transitions. [2021-03-10 22:15:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:27,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:27,005 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:27,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19982,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:27,205 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1175780862, now seen corresponding path program 113 times [2021-03-10 22:15:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606395312] [2021-03-10 22:15:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606395312] [2021-03-10 22:15:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629275150] [2021-03-10 22:15:27,669 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:27,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:15:27,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:15:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:28,397 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:15:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:28,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:28,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:15:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219383410] [2021-03-10 22:15:28,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:28,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:28,613 INFO L87 Difference]: Start difference. First operand 1169 states and 4258 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:29,293 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:15:29,661 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-03-10 22:15:29,975 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 22:15:30,473 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 22:15:30,722 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-03-10 22:15:31,006 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 22:15:31,433 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-10 22:15:31,593 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:15:31,921 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-10 22:15:32,298 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-10 22:15:32,581 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 22:15:32,964 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:15:33,611 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-03-10 22:15:33,914 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-10 22:15:34,256 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 22:15:34,519 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:15:34,865 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-03-10 22:15:35,244 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-10 22:15:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:35,315 INFO L93 Difference]: Finished difference Result 1567 states and 5413 transitions. [2021-03-10 22:15:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:15:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:35,318 INFO L225 Difference]: With dead ends: 1567 [2021-03-10 22:15:35,318 INFO L226 Difference]: Without dead ends: 1522 [2021-03-10 22:15:35,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 6578.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1887, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:15:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-03-10 22:15:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1171. [2021-03-10 22:15:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.647008547008547) internal successors, (4267), 1170 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 4267 transitions. [2021-03-10 22:15:35,332 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 4267 transitions. Word has length 20 [2021-03-10 22:15:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:35,332 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 4267 transitions. [2021-03-10 22:15:35,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 4267 transitions. [2021-03-10 22:15:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:35,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:35,333 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:35,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20273,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:35,534 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash 477323246, now seen corresponding path program 114 times [2021-03-10 22:15:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:35,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364764812] [2021-03-10 22:15:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:35,710 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:15:35,843 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:15:35,988 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:15:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364764812] [2021-03-10 22:15:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887218276] [2021-03-10 22:15:36,252 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:36,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:15:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:15:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:36,641 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:15:37,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:37,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:37,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:37,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:37,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:37,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:37,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:15:37,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:15:37,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,849 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-03-10 22:15:38,850 INFO L628 ElimStorePlain]: treesize reduction 482, result has 50.6 percent of original size [2021-03-10 22:15:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:38,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:38,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:38,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:39,316 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 22:15:39,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:39,325 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:39,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:39,334 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:39,729 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 22:15:39,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:39,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:39,738 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:39,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:39,747 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:40,136 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 22:15:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:40,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:15:40,154 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:1111, output treesize:461 [2021-03-10 22:15:40,753 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 129 [2021-03-10 22:15:41,410 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 91 [2021-03-10 22:15:44,154 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_10, ends_with_6, v_prenex_1208, v_prenex_1209, v_prenex_1199, v_prenex_1177, v_prenex_1178, v_prenex_1179, v_prenex_1180, v_prenex_1170, v_prenex_1181, v_prenex_1171, v_prenex_1182, v_prenex_1172, v_prenex_1183, v_prenex_1173, v_prenex_1184, v_prenex_1174, v_prenex_1185, v_prenex_1175, v_prenex_1186, v_prenex_1198, v_prenex_1176, v_prenex_1187], 10=[v_prenex_1201, v_prenex_1191], 15=[v_prenex_1205, v_prenex_1195]} [2021-03-10 22:15:44,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:15:44,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:15:44,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,978 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 117 [2021-03-10 22:15:44,979 INFO L628 ElimStorePlain]: treesize reduction 1097, result has 21.1 percent of original size [2021-03-10 22:15:44,979 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-03-10 22:15:44,979 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1208 vanished before elimination [2021-03-10 22:15:44,979 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1209 vanished before elimination [2021-03-10 22:15:44,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:44,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:45,224 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 22:15:45,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1177 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1178 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1179 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1180 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1170 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1181 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1171 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1182 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1172 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1183 vanished before elimination [2021-03-10 22:15:45,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1173 vanished before elimination [2021-03-10 22:15:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:45,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:45,473 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:15:45,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:45,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:45,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:45,706 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-10 22:15:45,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:45,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:45,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:45,938 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 22:15:45,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:45,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:45,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:46,173 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 22:15:46,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:46,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:46,398 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 22:15:46,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:46,407 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:46,631 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 22:15:46,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:46,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1176 vanished before elimination [2021-03-10 22:15:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:46,640 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:46,843 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:15:46,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:46,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:46,851 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:46,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:46,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,057 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:15:47,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:47,065 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,272 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 22:15:47,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:47,281 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:47,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,471 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 22:15:47,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:47,479 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,663 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:15:47,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 28 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:15:47,668 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 48 variables, input treesize:1491, output treesize:193 [2021-03-10 22:15:47,972 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 22:15:48,130 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:15:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:48,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:48,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:15:48,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190515315] [2021-03-10 22:15:48,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:48,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:48,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:48,276 INFO L87 Difference]: Start difference. First operand 1171 states and 4267 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:48,444 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:15:48,626 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:15:49,102 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 22:15:49,345 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 22:15:50,078 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 105 [2021-03-10 22:15:50,387 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 22:15:50,980 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 22:15:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:51,098 INFO L93 Difference]: Finished difference Result 1565 states and 5392 transitions. [2021-03-10 22:15:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:15:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:51,102 INFO L225 Difference]: With dead ends: 1565 [2021-03-10 22:15:51,102 INFO L226 Difference]: Without dead ends: 1520 [2021-03-10 22:15:51,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4515.9ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:15:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-10 22:15:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1183. [2021-03-10 22:15:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.6463620981387477) internal successors, (4310), 1182 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 4310 transitions. [2021-03-10 22:15:51,116 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 4310 transitions. Word has length 20 [2021-03-10 22:15:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:51,116 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 4310 transitions. [2021-03-10 22:15:51,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 4310 transitions. [2021-03-10 22:15:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:51,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:51,118 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:51,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20296 [2021-03-10 22:15:51,318 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1662405226, now seen corresponding path program 115 times [2021-03-10 22:15:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:51,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136532221] [2021-03-10 22:15:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:51,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136532221] [2021-03-10 22:15:51,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488347403] [2021-03-10 22:15:51,780 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:52,091 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 22:15:52,246 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 22:15:53,079 INFO L446 ElimStorePlain]: Different costs {6=[ends_with_2], 15=[v_prenex_1213]} [2021-03-10 22:15:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:53,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:53,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:53,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:53,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:15:53,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:53,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,945 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2021-03-10 22:15:53,945 INFO L628 ElimStorePlain]: treesize reduction 237, result has 66.3 percent of original size [2021-03-10 22:15:53,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:53,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:53,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:53,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:53,980 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:53,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:53,998 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:54,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:54,007 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:54,016 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:54,397 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:15:54,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:54,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 10 xjuncts. [2021-03-10 22:15:54,415 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:809, output treesize:429 [2021-03-10 22:15:54,976 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 125 [2021-03-10 22:15:57,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:57,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:57,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:57,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:57,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:57,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:57,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:57,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:57,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:57,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:57,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:57,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:57,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:58,099 WARN L205 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 132 [2021-03-10 22:15:58,100 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 20.1 percent of original size [2021-03-10 22:15:58,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:58,111 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:58,407 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 22:15:58,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:58,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:58,713 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 22:15:58,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:58,724 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,017 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 22:15:59,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:59,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:59,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,315 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-10 22:15:59,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:59,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:59,326 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,610 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 22:15:59,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:59,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:59,620 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,902 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 22:15:59,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:59,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:59,912 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:00,196 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-10 22:16:00,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:00,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:00,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:00,506 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:16:00,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:00,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:00,516 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:00,811 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-10 22:16:00,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:00,820 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:01,097 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 22:16:01,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:01,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:01,107 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:01,392 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 22:16:01,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:01,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:01,402 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:01,694 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-10 22:16:01,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:01,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:01,704 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:01,714 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,001 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 22:16:02,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:02,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-10 22:16:02,006 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 22 variables, input treesize:2125, output treesize:252 [2021-03-10 22:16:02,405 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 22:16:02,771 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:16:02,953 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 22:16:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:03,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:03,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:16:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63815378] [2021-03-10 22:16:03,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:03,129 INFO L87 Difference]: Start difference. First operand 1183 states and 4310 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:03,310 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:16:03,755 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:16:04,327 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-03-10 22:16:05,000 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-10 22:16:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:05,067 INFO L93 Difference]: Finished difference Result 1420 states and 4971 transitions. [2021-03-10 22:16:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:16:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:05,070 INFO L225 Difference]: With dead ends: 1420 [2021-03-10 22:16:05,070 INFO L226 Difference]: Without dead ends: 1405 [2021-03-10 22:16:05,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3498.3ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:16:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-03-10 22:16:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-03-10 22:16:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.6463620981387477) internal successors, (4310), 1182 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 4310 transitions. [2021-03-10 22:16:05,083 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 4310 transitions. Word has length 20 [2021-03-10 22:16:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:05,083 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 4310 transitions. [2021-03-10 22:16:05,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 4310 transitions. [2021-03-10 22:16:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:05,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:05,085 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:05,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20661 [2021-03-10 22:16:05,285 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:05,285 INFO L82 PathProgramCache]: Analyzing trace with hash 722056834, now seen corresponding path program 116 times [2021-03-10 22:16:05,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:05,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481826831] [2021-03-10 22:16:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481826831] [2021-03-10 22:16:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901525780] [2021-03-10 22:16:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:16:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:16:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:06,173 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 22:16:06,344 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:16:07,565 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_1235, v_prenex_1236, v_prenex_1237, v_prenex_1241], 10=[ends_with_2, v_prenex_1238], 28=[v_prenex_1244]} [2021-03-10 22:16:07,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:07,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:16:07,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:08,787 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 212 DAG size of output: 132 [2021-03-10 22:16:08,788 INFO L628 ElimStorePlain]: treesize reduction 640, result has 47.8 percent of original size [2021-03-10 22:16:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:08,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:09,337 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-03-10 22:16:09,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:09,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:09,886 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 22:16:09,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:09,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,791 WARN L205 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2021-03-10 22:16:10,791 INFO L628 ElimStorePlain]: treesize reduction 100, result has 82.5 percent of original size [2021-03-10 22:16:10,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:10,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:10,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:11,237 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-10 22:16:11,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:11,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:11,674 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 22:16:11,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:11,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:11,685 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:11,694 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:11,709 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:12,130 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:16:12,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:12,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 7 dim-1 vars, End of recursive call: 12 dim-0 vars, and 10 xjuncts. [2021-03-10 22:16:12,158 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1285, output treesize:449 [2021-03-10 22:16:12,821 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 129 [2021-03-10 22:16:13,156 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:16:14,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:14,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:14,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:14,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:16:14,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:14,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:14,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:14,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:15,528 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 95 [2021-03-10 22:16:15,529 INFO L628 ElimStorePlain]: treesize reduction 783, result has 23.4 percent of original size [2021-03-10 22:16:15,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:15,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:15,750 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 22:16:15,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:15,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:15,972 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-10 22:16:15,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:15,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:15,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,202 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 22:16:16,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:16,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:16,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,416 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 22:16:16,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:16,426 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,645 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 22:16:16,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:16,654 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,859 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 22:16:16,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:16,867 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,065 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 22:16:17,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:17,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,271 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 22:16:17,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:17,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,466 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:16:17,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:17,475 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,660 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 22:16:17,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:17,669 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,857 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 22:16:17,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:16:17,861 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 17 variables, input treesize:1169, output treesize:156 [2021-03-10 22:16:18,043 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 22:16:18,301 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:16:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:18,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:18,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:16:18,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321628685] [2021-03-10 22:16:18,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:18,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:18,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:18,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:18,442 INFO L87 Difference]: Start difference. First operand 1183 states and 4310 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:18,880 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:16:20,178 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-03-10 22:16:20,700 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 22:16:21,229 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 22:16:21,630 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-03-10 22:16:22,249 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-10 22:16:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:22,280 INFO L93 Difference]: Finished difference Result 1423 states and 4965 transitions. [2021-03-10 22:16:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:16:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:22,284 INFO L225 Difference]: With dead ends: 1423 [2021-03-10 22:16:22,284 INFO L226 Difference]: Without dead ends: 1378 [2021-03-10 22:16:22,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5121.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:16:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-03-10 22:16:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1178. [2021-03-10 22:16:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.6482582837723023) internal successors, (4294), 1177 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 4294 transitions. [2021-03-10 22:16:22,297 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 4294 transitions. Word has length 20 [2021-03-10 22:16:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:22,297 INFO L480 AbstractCegarLoop]: Abstraction has 1178 states and 4294 transitions. [2021-03-10 22:16:22,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 4294 transitions. [2021-03-10 22:16:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:22,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:22,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:22,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21189,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:22,499 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1732515262, now seen corresponding path program 117 times [2021-03-10 22:16:22,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:22,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749741829] [2021-03-10 22:16:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:22,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749741829] [2021-03-10 22:16:22,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736793271] [2021-03-10 22:16:22,905 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:22,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:16:22,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:16:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:23,237 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 22:16:23,401 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 22:16:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:23,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:23,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:23,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:23,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:23,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:16:23,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:24,754 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2021-03-10 22:16:24,755 INFO L628 ElimStorePlain]: treesize reduction 240, result has 62.2 percent of original size [2021-03-10 22:16:24,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1266 vanished before elimination [2021-03-10 22:16:24,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:24,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:24,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,110 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:16:25,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:25,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:25,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,460 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 22:16:25,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:25,461 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1263 vanished before elimination [2021-03-10 22:16:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:25,469 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,800 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:16:25,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:25,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 6 dim-1 vars, End of recursive call: 4 dim-0 vars, and 10 xjuncts. [2021-03-10 22:16:25,807 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:695, output treesize:381 [2021-03-10 22:16:26,401 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-03-10 22:16:29,682 INFO L446 ElimStorePlain]: Different costs {1=[ends_with_6, v_prenex_1272, v_prenex_1284], 3=[v_prenex_1278], 15=[ends_with_2, v_prenex_1271, v_prenex_1283], 21=[v_prenex_1277]} [2021-03-10 22:16:29,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:29,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:29,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:29,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:29,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:31,360 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 235 DAG size of output: 128 [2021-03-10 22:16:31,361 INFO L628 ElimStorePlain]: treesize reduction 1506, result has 30.3 percent of original size [2021-03-10 22:16:31,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:31,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:31,381 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:31,979 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-10 22:16:31,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:31,990 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:32,001 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,606 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 22:16:32,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:32,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,617 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,628 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,639 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:32,649 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:32,659 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:32,669 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,680 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,691 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:32,702 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,244 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-10 22:16:33,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:33,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:33,256 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:33,266 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,809 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-10 22:16:33,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:33,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:33,819 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:33,828 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:34,858 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-03-10 22:16:34,858 INFO L628 ElimStorePlain]: treesize reduction 43, result has 92.8 percent of original size [2021-03-10 22:16:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:34,869 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,402 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 22:16:35,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:35,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:35,414 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:35,425 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:35,436 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:35,448 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:35,459 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:35,471 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:35,482 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:35,493 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:35,505 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:35,993 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 22:16:35,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:35,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-03-10 22:16:35,999 INFO L247 ElimStorePlain]: Needed 36 recursive calls to eliminate 25 variables, input treesize:2527, output treesize:414 [2021-03-10 22:16:36,558 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-03-10 22:16:36,839 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:16:37,007 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:16:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:16:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257071391] [2021-03-10 22:16:37,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:37,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:37,155 INFO L87 Difference]: Start difference. First operand 1178 states and 4294 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:37,660 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 28 [2021-03-10 22:16:38,046 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-03-10 22:16:38,772 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 22:16:39,457 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-03-10 22:16:40,093 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-03-10 22:16:40,604 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-03-10 22:16:41,114 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-10 22:16:41,734 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-03-10 22:16:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:41,812 INFO L93 Difference]: Finished difference Result 1442 states and 5041 transitions. [2021-03-10 22:16:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:16:41,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:41,815 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 22:16:41,815 INFO L226 Difference]: Without dead ends: 1397 [2021-03-10 22:16:41,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6067.5ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:16:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-03-10 22:16:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1177. [2021-03-10 22:16:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.647108843537415) internal successors, (4289), 1176 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 4289 transitions. [2021-03-10 22:16:41,828 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 4289 transitions. Word has length 20 [2021-03-10 22:16:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:41,828 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 4289 transitions. [2021-03-10 22:16:41,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 4289 transitions. [2021-03-10 22:16:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:41,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:41,830 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:42,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21637,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:42,043 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash 208457904, now seen corresponding path program 118 times [2021-03-10 22:16:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357448152] [2021-03-10 22:16:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:42,419 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 22:16:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:42,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357448152] [2021-03-10 22:16:42,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625320474] [2021-03-10 22:16:42,592 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:42,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:16:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:16:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:42,890 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:16:43,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:43,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:43,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:43,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:43,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:43,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:43,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:43,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:43,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:43,451 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 22:16:43,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:43,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 8 xjuncts. [2021-03-10 22:16:43,457 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:399, output treesize:359 [2021-03-10 22:16:43,817 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 22:16:44,118 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 22:16:44,348 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 22:16:45,819 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_1291, v_prenex_1292], 21=[ends_with_2, ends_with_10]} [2021-03-10 22:16:45,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:45,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:45,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:45,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:16:45,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:45,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,409 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-03-10 22:16:46,410 INFO L628 ElimStorePlain]: treesize reduction 777, result has 21.3 percent of original size [2021-03-10 22:16:46,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:46,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:46,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,588 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 22:16:46,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:46,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:46,596 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:46,604 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:46,611 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:46,619 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,766 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 22:16:46,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:46,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:46,775 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:46,782 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:46,790 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:46,797 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:46,929 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 22:16:46,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:46,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:16:46,932 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:1143, output treesize:126 [2021-03-10 22:16:47,159 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:16:47,374 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 22:16:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:16:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333159952] [2021-03-10 22:16:47,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:16:47,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:16:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:16:47,407 INFO L87 Difference]: Start difference. First operand 1177 states and 4289 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:47,567 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:16:47,760 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:16:47,924 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 22:16:48,373 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:16:49,062 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2021-03-10 22:16:50,039 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 85 [2021-03-10 22:16:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:50,093 INFO L93 Difference]: Finished difference Result 1320 states and 4684 transitions. [2021-03-10 22:16:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:16:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:50,096 INFO L225 Difference]: With dead ends: 1320 [2021-03-10 22:16:50,096 INFO L226 Difference]: Without dead ends: 1305 [2021-03-10 22:16:50,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4014.9ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:16:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-03-10 22:16:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1177. [2021-03-10 22:16:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.647108843537415) internal successors, (4289), 1176 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 4289 transitions. [2021-03-10 22:16:50,109 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 4289 transitions. Word has length 20 [2021-03-10 22:16:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:50,109 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 4289 transitions. [2021-03-10 22:16:50,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 4289 transitions. [2021-03-10 22:16:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:50,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:50,111 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:50,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21873,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:50,321 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -201269290, now seen corresponding path program 119 times [2021-03-10 22:16:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:50,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171333961] [2021-03-10 22:16:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:50,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171333961] [2021-03-10 22:16:50,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290994906] [2021-03-10 22:16:50,794 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:50,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:16:50,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:16:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:51,151 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 22:16:51,450 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:16:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:51,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:51,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:16:51,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32246840] [2021-03-10 22:16:51,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:51,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:51,937 INFO L87 Difference]: Start difference. First operand 1177 states and 4289 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:52,238 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:16:52,410 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 22:16:52,714 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 22:16:52,963 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:16:53,147 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:16:53,343 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:16:53,667 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-10 22:16:54,074 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 22:16:54,510 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-03-10 22:16:55,091 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-03-10 22:16:55,471 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 22:16:55,693 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:16:55,978 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:16:56,277 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 22:16:56,499 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 22:16:56,784 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:16:56,986 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 22:16:57,147 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:16:57,416 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:16:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:57,460 INFO L93 Difference]: Finished difference Result 1695 states and 5644 transitions. [2021-03-10 22:16:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:16:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:57,464 INFO L225 Difference]: With dead ends: 1695 [2021-03-10 22:16:57,464 INFO L226 Difference]: Without dead ends: 1620 [2021-03-10 22:16:57,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 5781.5ms TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:16:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-03-10 22:16:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1182. [2021-03-10 22:16:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.6528365791701947) internal successors, (4314), 1181 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4314 transitions. [2021-03-10 22:16:57,478 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4314 transitions. Word has length 20 [2021-03-10 22:16:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:57,478 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 4314 transitions. [2021-03-10 22:16:57,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4314 transitions. [2021-03-10 22:16:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:57,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:57,479 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-03-10 22:16:57,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22175,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:57,680 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash 151106400, now seen corresponding path program 120 times [2021-03-10 22:16:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:57,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149439005] [2021-03-10 22:16:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-03-10 22:16:57,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850023225] [2021-03-10 22:16:57,683 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:57,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:16:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:16:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:57,758 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-03-10 22:16:57,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:57,959 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:16:57,961 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:16:57,962 INFO L202 PluginConnector]: Adding new model nzb-file-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:16:57 BasicIcfg [2021-03-10 22:16:57,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:16:57,962 INFO L168 Benchmark]: Toolchain (without parser) took 789766.91 ms. Allocated memory was 325.1 MB in the beginning and 513.8 MB in the end (delta: 188.7 MB). Free memory was 305.0 MB in the beginning and 308.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 188.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 325.1 MB. Free memory was 306.4 MB in the beginning and 306.4 MB in the end (delta: 75.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 325.1 MB. Free memory was 304.4 MB in the beginning and 302.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 INFO L168 Benchmark]: Boogie Preprocessor took 28.57 ms. Allocated memory is still 325.1 MB. Free memory was 302.9 MB in the beginning and 301.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 INFO L168 Benchmark]: RCFGBuilder took 479.31 ms. Allocated memory is still 325.1 MB. Free memory was 301.8 MB in the beginning and 292.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 INFO L168 Benchmark]: TraceAbstraction took 789218.84 ms. Allocated memory was 325.1 MB in the beginning and 513.8 MB in the end (delta: 188.7 MB). Free memory was 291.6 MB in the beginning and 308.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 173.3 MB. Max. memory is 16.0 GB. [2021-03-10 22:16:57,962 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 0.10 ms. Allocated memory is still 325.1 MB. Free memory was 306.4 MB in the beginning and 306.4 MB in the end (delta: 75.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 325.1 MB. Free memory was 304.4 MB in the beginning and 302.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.57 ms. Allocated memory is still 325.1 MB. Free memory was 302.9 MB in the beginning and 301.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 479.31 ms. Allocated memory is still 325.1 MB. Free memory was 301.8 MB in the beginning and 292.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 789218.84 ms. Allocated memory was 325.1 MB in the beginning and 513.8 MB in the end (delta: 188.7 MB). Free memory was 291.6 MB in the beginning and 308.1 MB in the end (delta: -16.5 MB). Peak memory consumption was 173.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 143). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 789122.7ms, OverallIterations: 146, TraceHistogramMax: 1, EmptinessCheckTime: 153.2ms, AutomataDifference: 334425.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9187 SDtfs, 15299 SDslu, 59567 SDs, 0 SdLazy, 65689 SolverSat, 5603 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41508.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5574 GetRequests, 1705 SyntacticMatches, 127 SemanticMatches, 3742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29814 ImplicationChecksByTransitivity, 387178.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1183occurred in iteration=140, InterpolantAutomatonStates: 2750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1393.0ms AutomataMinimizationTime, 145 MinimizatonAttempts, 44015 StatesRemovedByMinimization, 141 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 704.4ms SsaConstructionTime, 1664.1ms SatisfiabilityAnalysisTime, 421073.1ms InterpolantComputationTime, 5235 NumberOfCodeBlocks, 5235 NumberOfCodeBlocksAsserted, 400 NumberOfCheckSat, 4967 ConstructedInterpolants, 174 QuantifiedInterpolants, 209291 SizeOfPredicates, 1809 NumberOfNonLiveVariables, 10220 ConjunctsInSsa, 4579 ConjunctsInUnsatCore, 268 InterpolantComputations, 22 PerfectInterpolantSequences, 18/740 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